Made from siliconized CORDURA nylon fabric, the Ultra-Sil Dry Sack keeps your gear dry without sacrificing light weight. Ideal for those who want to keep clothing and equipment dry and packed separately by color inside a backpack or travel bag. Through the semi-transparent fabric, you can easily see the contents. If you're really organized, you'll use multiple color options to make finding your gear even easier. The award-winning Ultra-Sil Dry Sack is suitable for backpackers, cyclists and travelers. It features a moisture-wicking roll-up closure, round bottom for easy packing, and taped seams to keep moisture out.
Made from siliconized CORDURA nylon fabric, the Ultra-Sil Dry Sack keeps your gear dry without sacrificing light weight. Ideal for those who want to keep clothing and equipment dry and packed separately by color inside a backpack or travel bag. Through the semi-transparent fabric, you can easily see the contents. If you're really organized, you'll use multiple color options to make finding your gear even easier. The award-winning Ultra-Sil Dry Sack is suitable for backpackers, cyclists and travelers. It features a moisture-wicking roll-up closure, round bottom for easy packing, and taped seams to keep moisture out.
in 2 offers
The lowest price for Sea to Summit Ultra-Sil Dry Sack-Grey-8 litres right now is $22.32 at Woolworths, compared across 2 retailers.
The all-time low was $12.00 on 19 Oct 2023 — today's price is 86% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 14 Sept 2026.
Sea to Summit Ultra-Sil Dry Sack-Grey-8 litres
Made from siliconized CORDURA nylon fabric, the Ultra-Sil Dry Sack keeps your gear dry without sacrificing light weight. Ideal for those who want to keep clothing and equipment dry and packed separately by color inside a backpack or travel bag. Through the semi-transparent fabric, you can easily see the contents. If you're really organized, you'll use multiple color options to make finding your gear even easier. The award-winning Ultra-Sil Dry Sack is suitable for backpackers, cyclists and travelers. It features a moisture-wicking roll-up closure, round bottom for easy packing, and taped seams to keep moisture out.
Made from siliconized CORDURA nylon fabric, the Ultra-Sil Dry Sack keeps your gear dry without sacrificing light weight. Ideal for those who want to keep clothing and equipment dry and packed separately by color inside a backpack or travel bag. Through the semi-transparent fabric, you can easily see the contents. If you're really organized, you'll use multiple color options to make finding your gear even easier. The award-winning Ultra-Sil Dry Sack is suitable for backpackers, cyclists and travelers. It features a moisture-wicking roll-up closure, round bottom for easy packing, and taped seams to keep moisture out.
Last updated at 14/09/2026 09:16:46
Sea to Summit Ultra-Sil Dry Bag 8 Litre - High Rise Grey
Delivery between 17–25 Sept $10
Ultra-Sil Dry Sack
Delivery $9.95
originally posted on anacondastores.com
Very lightweight and things stuff into the bag nicely. For my purposes this time I only required the 8L. I like it very much. I have several other sizes in these for larger items. I like Sea to Summit products and have most of what they make. The Big River bag is more for kayaking, not so much for backpacking and hiking as it is much heavier, but the lightweight dry sacks still keep your items very dry. Highly recommend them and all Sea to Summit products. Get yourself an 8L and even 20L. You won’t be disappointed.
originally posted on seatosummitusa.com
I now use this as my main interior sack instead of a pack liner. It's not only useful to stay organized, but it's so much better than using the noisy plastic pack liner, especially when you are packing up and getting out of camp quietly. It's much faster compared to struggling with a plastic pack liner too, as the ultra sil just slips right into my 55L backpack easily. The dry sack does exactly what it does, and I haven't had an issue with moisture leaking inside.
originally posted on seatosummitusa.com
HEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic ... MoreHEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic carpet underneath me (Not the best analogy but bear with me and my lack of any sleep).Suggestions: (a) either impose a full coat of more traction holding fabric along the entire surface or (b) patches/lines of far more tractive force creating material in a pattern throughout the pad.All in all, I regret buying this twice for my wife & I - we both desperately want to return these things but have passed your 60 day return policy as we ordered it while abroad and the biggest regret I have is having to now deal with reselling it on FB Marketplace.I apologize for the rant but it is an honest review and again, I hope it helps with future designs.
| Hand Orientation | Left/Right |
| Style | Round |
| Season | 4 |
| Sport | Camping & Hiking |
| Included Components | dry sack |
Sea to Summit Ultra-Sil Dry Bag 8 Litre - High Rise Grey
Delivery between 17–25 Sept $10
Ultra-Sil Dry Sack
Delivery $9.95
Very lightweight and things stuff into the bag nicely. For my purposes this time I only required the 8L. I like it very much. I have several other sizes in these for larger items. I like Sea to Summit products and have most of what they make. The Big River bag is more for kayaking, not so much for backpacking and hiking as it is much heavier, but the lightweight dry sacks still keep your items very dry. Highly recommend them and all Sea to Summit products. Get yourself an 8L and even 20L. You won’t be disappointed.
I now use this as my main interior sack instead of a pack liner. It's not only useful to stay organized, but it's so much better than using the noisy plastic pack liner, especially when you are packing up and getting out of camp quietly. It's much faster compared to struggling with a plastic pack liner too, as the ultra sil just slips right into my 55L backpack easily. The dry sack does exactly what it does, and I haven't had an issue with moisture leaking inside.
HEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic ... MoreHEADS UP - this isn't the kindest review courtesy of my lack of sleep. I hope this comes as helpful critique that ensures the future implementation of customer design is the highest quality possible but I'm sure with my current position and short fuse this is going to be a rough read.After 6 nights on this pad I hate this product and cannot stand to take it on the AT or any future adventure. I know y'all put great effort into the engineering but by God this is the worst mat I've ever slept on. I prefer to sleep on the tent floor.The sheer noise it makes was enough to have woken up my fellow campers and the lack of traction on it creates such an uncomfortable balancing act just to stay onboard the mat I felt I was riding a lubed up surfboard on a gliding magic carpet underneath me (Not the best analogy but bear with me and my lack of any sleep).Suggestions: (a) either impose a full coat of more traction holding fabric along the entire surface or (b) patches/lines of far more tractive force creating material in a pattern throughout the pad.All in all, I regret buying this twice for my wife & I - we both desperately want to return these things but have passed your 60 day return policy as we ordered it while abroad and the biggest regret I have is having to now deal with reselling it on FB Marketplace.I apologize for the rant but it is an honest review and again, I hope it helps with future designs.
Purchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 ... MorePurchased two 2L drybags for my wife and I, to hold our smart phones, wallets, keys etc. We normally store our drybags in the day hatch of our Kayaks. While practicing our rolls, it’s understandable that some water will get into our day hatches. That’s expected. What wasn’t expected was that water got into my drybag, soaking my phone. Jury is still out on whether I’ll be able to get the phone back up and running. If not……$500 gone.After getting home I did a leak test on both bags. Filled them up with water to see if any would leak out. Unfortunately, both leaked like a sieve. These bags are NOT waterproof, as water permeated through the fabric, and not the seams. Totally disappointed with this product. Will not buy another. BTW, these drybags were only purchased 2 months ago.
I bought a number of these dry bags in different sizes and colors. I just got off a river in the Arctic National Wildlife Refuge and it rained every day, except ONE! I was rafting and used a large, tough dry bag, lined with a large Ultra Sil dry sac ... then organized my gear into these smaller bags. I have found that redundancy in the field is a good thing! It was so nice to reach in and grab a bag, knowing what was inside!!! All my clothing and gear that needed to stay dry DID. As I pulled individual Ultra Sil Dry Bags out for different items, the other things in my pack stayed dry. Organization and dryness - what more could I ask for!One thing I noticed is that I don't need as large a dry bag as I thought I did, as you can compress items, and save space. For ... MoreI bought a number of these dry bags in different sizes and colors. I just got off a river in the Arctic National Wildlife Refuge and it rained every day, except ONE! I was rafting and used a large, tough dry bag, lined with a large Ultra Sil dry sac ... then organized my gear into these smaller bags. I have found that redundancy in the field is a good thing! It was so nice to reach in and grab a bag, knowing what was inside!!! All my clothing and gear that needed to stay dry DID. As I pulled individual Ultra Sil Dry Bags out for different items, the other things in my pack stayed dry. Organization and dryness - what more could I ask for!One thing I noticed is that I don't need as large a dry bag as I thought I did, as you can compress items, and save space. For their intended purpose, these Ultra Sil Dry Bags hold up very well. You will always want to protect them with a heavier weight, sturdy bag on the outside. Also, very light! Great product.
I purchased the 20 liter dry sac as bag liner for my 40 ultimate Direction Fast Pack. Given the wt and durability this is a great option for pro texting items inside the pack for 4-5 day excursions during a fast pack trip or even a 100 mile race. The peace of mind knowing your gear is safe inside like sleep system and electronics “power bank” are a game changer. I did try polycro bag liner a bit to fragile for me. Over all happy with the purchase and would buy again and recommend for UL packing.
Is anything completely waterproof? This bag isn't, but it's not bad either.I'm grateful to Sea to Summit for sending me the item at no cost to me in exchange for an honest review of the item. So I decide to put it through some tough testing. I'm really curious about the claim of being "waterproof" that is so prominent on the label.I started with two very tough tests on this bag: I filled the bag full of wadded up paper and some socks, then sealed it up and sunk it in a sink and let it sit overnight. The next morning I checked it out and the paper had beome somewhat wet.The second test I stuffed it completely full of paper and sealed it up agaain. After I put it in the sink, I could squeze air out of it--which tells me if air can get out, then water can probably ... MoreIs anything completely waterproof? This bag isn't, but it's not bad either.I'm grateful to Sea to Summit for sending me the item at no cost to me in exchange for an honest review of the item. So I decide to put it through some tough testing. I'm really curious about the claim of being "waterproof" that is so prominent on the label.I started with two very tough tests on this bag: I filled the bag full of wadded up paper and some socks, then sealed it up and sunk it in a sink and let it sit overnight. The next morning I checked it out and the paper had beome somewhat wet.The second test I stuffed it completely full of paper and sealed it up agaain. After I put it in the sink, I could squeze air out of it--which tells me if air can get out, then water can probably get in. I let it sit for several hours and came back. All of the paper was soaked and there was about a cup of water inside the bag.Maybe I'm expecting too much from the product. Maybe I'm not sealing it properly. Both are possibilities.On the sealing up of the bag: I was disappointed that the instructions were on the reverse side needed to follow them easily. If the instructions were on the other side of the bag, then the picture in the instructions would match the bag as you hold it--but it's not that way. The picture is on the opposite side so you have to look at the picture in the bag and then reverse it in your mind to seal it up right.For a third test, I decided to fill the bag up with water and seal it up, then put it in a large bowl (upside down) and let it sit for 1 hour. I would then see how much water leaked out. If it's going to keep water out, it also needs to keep water in. As I had feared, after one hour there was a good amount of leakage--nearly 1/2 a cup (100 ml) had drained out. Which means it could also drain in.I consider the possiblity that I'm doing it wrong--that's always something to consider! So I watch a few online videos. One recommends putting five to six folds in the top, another recommends putting your gear inside a plastic garbage bag and then putting that bag inside the dry bag. A third video doesn't tell me anything.So for my next test, I stuff with paper again, squeeze the air out, and put six rolls in the top. I toss it in the shower for 15 minutes to simulate a rainstorm. After 15 minutes I pull it out and the paper is wet--not soaked completely, but plainly wet. Certainly "dryer" than if I had put the paper in the shower without the bag at all--but the stuff's still very wet. It's at this point I think to myself that if I had actually paid for this product I'd take it back for a refund.I set up one final test: A bag in a bag. I get a common household garbage bag and stuff it in the dry bag, then stuff the garbage bag with paper. I then tie the garbage bag to stuf in the dry bag, and seal the dry bag as instructed. I then place it in a vessel of water to see how it performs.Immedaitely I find out that there is a good amount of air trapped in the garbage bag that I can't really "press out" easily and it is clumsy to work through. I do my best, but a good amount of air is trapped in the dry bag. I also wonder what happens in the field when I want to get at my gear in the bag and then re-close the bag--does the garbage bag survive being opened and closed multiple times.The final results of this test were that after two hours the inner garbage bag tied up DID keep everything inside of it dry, but the material between the garbabge bag and the dry bag had a good amount of moisture.I did not complete any tests on the strenght of the dry bag, but it does appear to be sturdy and durable. It certainly stands up to basic use without tearing, unlike a garbage bag alone.Good points:1) It collapses down very small and makes for a very nice container for water. I'm pretty good at bushcraft, but it's kind of hard to make a "bucket" out in the field.2) It keeps stuff "mostly dry" -- better than nothing at all.3) It is easy to open and close.4) It is easy to pack and unpack.5) Because air tends to get trapped in the bag, most of the time as regular pack of gear will float in water.6) If a buckle breaks, it can be replaced -- although I not test that feature.Not-so-good points:1) It isn't waterproof.2) It can trap air and become bulky to pack (although this leads to good point #5 above).3) The buckling system of rolling then buckling is awkward and takes up space in the pack.Conclusions:It's better than nothing, and coupled with a secondary bag such as a garbage bag, it can be a useful tool on trips where you expect the peril of extreme water--kayak, canoe, or rainforest hiking. I wouldn't trust it alone to keep gear dry--especially electornics gear. However, I'll use it on such trips because that coupled with a secondary bag is really just about the only hope you have--alternatives are just not available.I'm not saying I wouldn't use it--I am saying that i wouldn't use it by itself and expect it to keep the contents completely dry. It says it's waterproof, but it isn't.PLUS: A number of the reviews here are showing total success in keeping gear dry, and that is consistent with reviews on other websites. There may be tips and tricks that I have missed.
We are very happy with this drybag purchase for our kayak-packing adventures! Sea to Summit, in our experience, has been a reliable and quality brand so we felt confident in this purchase from the start. The bag is lightweight and malleable so you can fit a lot into this bag AND fit this bag into a lot of places once packed. We have Wilderness System kayaks (Tempests) and we need to pack camping gear in all of the hatches but only one hatch can easily fit full dry bags. With this drybag, however, you can easily squeeze it into all hatches thanks to its soft material with plenty of give. That said, I was pretty skeptical that this bag would keep our stuff dry and not tear when actually out in the elements because the material feels similar to a balloon, it's so thin. ... MoreWe are very happy with this drybag purchase for our kayak-packing adventures! Sea to Summit, in our experience, has been a reliable and quality brand so we felt confident in this purchase from the start. The bag is lightweight and malleable so you can fit a lot into this bag AND fit this bag into a lot of places once packed. We have Wilderness System kayaks (Tempests) and we need to pack camping gear in all of the hatches but only one hatch can easily fit full dry bags. With this drybag, however, you can easily squeeze it into all hatches thanks to its soft material with plenty of give. That said, I was pretty skeptical that this bag would keep our stuff dry and not tear when actually out in the elements because the material feels similar to a balloon, it's so thin. BUT, after a handful of overnight trips, this bag has held up and has kept everything we've stuffed into it dry and intact. I'd highly recommend this bag if you need a flexible and durable pack!
The Big River Dry Bags are perfect for my canoe and kayak trips. SUP's too. They are tough, water tight, durable and the tie down grommets make for a dry secure load. I bought several sizes and like them so much, bought more to give as gifts. Everyone loves them.I also bought several different size Lightweight Dry Sacks, and am just as happy with them. I do a lot of 2- 7 day overnight backpacking trips in Maine, New Hampshire & Vermont. The bags are used constantly.
Took this out for the first time on the weekend. Went on a hike that has water crossings and parts where you have to swim to get to the track. Had two phones and a set of keys, when we stopped to get them out and take photos. The bag was wet inside - one phone still worked the other is currently sitting in rice hoping it will turn back on. My parents recommended this brand as they have a larger version of it and works well. Probably got a dud, but followed instructions on how to do it up and still damaged our goods inside.
| Hand Orientation | Left/Right |
| Style | Round |
| Season | 4 |
| Sport | Camping & Hiking |
| Included Components | dry sack |
