While advertised as a Dry Pack, unfortunately the pack leaked at every seam in a mild rainstorm - we will be returning ours. If you don't need "dry," it is well thought out from a design perspective and is a good pack for throwing in your bag when traveling to use as an around town day pack - every bit as light and packable as the Sea to Summit travel packs but with shoulder straps that disperse weight without cutting into your shoulders.

I bought this as a Christmas gift for my brother who is an avid cyclist. He loved it because of the following features: the ventilated part against his back with the placement for the water bladder, the compression straps to keep it compact, and the expansion capacity. He expects that it may be the last pack he ever needs. After all, he is 67.

First off, I should probably start by saying how much I love Osprey. I'm a bit biased, but what can I say? They deliver.I've gone through a couple of their pack covers, and they always end up with huge rips/tears from walking under tress/putting my pack down on a sharp rock, etc. Not Osprey's fault, but I needed something that would be protective from the elements always.Enter: the Ultralight Liner. Works exactly as intended. No issues yet after a couple uses.While Electric Lime isn't really my favorite color, I enjoy having it in my pack because it shows off the darker colors of my stuff inside my pack- the electric lime makes other items easier to see and find. Two thumbs way up for me.