Sea To Summit Spark -18C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Sea To Summit Spark -18C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
in 19 offers
The lowest price for Spark Down Sleeping Bag (7C, -1C, -9C & -18C) - -18C | Regular | Sea to Summit right now is $799.90 at Snowys Outdoors, compared across 19 retailers.
The all-time low was $499.99 on 2 Aug 2026 — today's price is 60% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 20 Oct 2026.
Spark Down Sleeping Bag (7C, -1C, -9C & -18C) - -18C | Regular | Sea to Summit
Sea To Summit Spark -18C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Sea To Summit Spark -18C sleeping bag is the perfect sleeping bag if you are counting grams, but still want to ensure a fantastic night's sleep. Filled with RDS certified 850+ fillpower goose down treated with a PFC-free Ultra-Dry Down treatment, the Spark features a technical hood and a zipper protection tube to retain heat. Comfort is guaranteed by a super breathable 10 denier inner fabric, while a 10D structure with a PFC-free DWR treatment and a highly water-repellent fabric for the hood and bottom of the bag repels wind and condensation. The full-length zip model can be paired with a corresponding Spark for women for comfort that couples can share.
Last updated at 20/10/2026 10:48:07
Sea to Summit Spark Down Sleeping Bag -18C|0F - Regular
Free delivery between 22–27 Oct
Sea To Summit Spark -18c/0f Down Sleeping Bag - Regular
Free delivery
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Sea to Summit Spark -18C/0F Down Sleeping Bag - Regular
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F / Regular
Delivery between 26–28 Oct $13.90
Sea to Summit Spark Down Sleeping Bag Men's -18°C / Regular
Delivery between 23 Oct – 2 Nov $9.99
Sea To Summit Spark-18°c Sleeping Bag Yellow Regular / Left Zipper
Delivery $41.99
Sea To Summit Spark Down Sleeping Bag Regular / -18C/0F
Free delivery
Sea To Summit Spark -18C Down Sleeping Bag Regular
Free delivery between Wed – Thu
Sea to Summit Spark -18°C / 0°F Ultra Dry Down Sleeping Bag (Regular) Grey / Yellow
Free delivery between 23–30 Oct
Sea to Summit Spark -18C Down Sleeping Bag (2024 New Version) Regular
Delivery $32.20
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
Sea to Summit Spark Down Sleeping Bag -18C|0F - Regular
Free delivery between 22–27 Oct
Sea To Summit Spark -18c/0f Down Sleeping Bag - Regular
Free delivery
Affiliate Disclosure: We may receive a small commission for purchases made through this link at no extra cost to you. This helps support our site. Thank you!
Sea to Summit Spark -18C/0F Down Sleeping Bag - Regular
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F / Regular
Delivery between 26–28 Oct $13.90
Sea to Summit Spark Down Sleeping Bag Men's -18°C / Regular
Delivery between 23 Oct – 2 Nov $9.99
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
