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 20 offers
The lowest price for Spark Down Sleeping Bag (7C, -1C, -9C & -18C) - -18C | Regular | Sea to Summit right now is $791.90 at Wallaroo Adventure Store, compared across 20 retailers.
The all-time low was $499.99 on 2 Aug 2026 — today's price is 58% above the lowest ever. It has been notably cheaper before — worth setting a price alert.
Prices last updated 4 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 04/10/2026 19:22:52
Sea To Summit Spark Down Sleeping Bag Regular / -18C/0F
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F - Regular
Free delivery between 7–12 Oct
Sea to Summit Spark Down Sleeping Bag -18C|0F / Regular
Delivery between 9–13 Oct $13.90
Sea to Summit Spark Down Sleeping Bag Men's -18°C / Regular
Delivery between 8–16 Oct $9.99
PAST Outdoors Sea to Summit Spark Down Sleeping Bag, -18C|0F / Regular
Delivery $13.90
Sea To Summit Spark-18°c Sleeping Bag Yellow Regular / Left Zipper
Delivery $42.49
Sea To Summit Spark -18C Down Sleeping Bag Regular
Free delivery between Tue – Wed
Sea to Summit Spark -18°C / 0°F Ultra Dry Down Sleeping Bag (Regular) Grey / Yellow
Free delivery between 8–15 Oct
Sea to Summit Spark -18C Down Sleeping Bag (2024 New Version) Regular
Delivery $31.57
Sleeping Bags Sea to Summit Spark Down Sleeping Bag -18°C Sea to Summit Regular
Delivery $114.60
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
Sea To Summit Spark Down Sleeping Bag Regular / -18C/0F
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F - Regular
Free delivery between 7–12 Oct
Sea to Summit Spark Down Sleeping Bag -18C|0F / Regular
Delivery between 9–13 Oct $13.90
Sea to Summit Spark Down Sleeping Bag Men's -18°C / Regular
Delivery between 8–16 Oct $9.99
PAST Outdoors Sea to Summit Spark Down Sleeping Bag, -18C|0F / Regular
Delivery $13.90
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
