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 18 offers
The lowest price for Spark Down Sleeping Bag (7C, -1C, -9C & -18C) - -18C | Long | Sea to Summit right now is $831.50 at Wallaroo Adventure Store, compared across 18 retailers.
The all-time low was $599.99 on 24 May 2026 — today's price is 39% 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 | Long | 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 07:50:08
Sea To Summit Spark Down Sleeping Bag Long / -18C/0F
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F - Long
Free delivery between 22–27 Oct
Sea to Summit Spark Down Sleeping Bag -18C|0F / Long
Delivery between 26–28 Oct $13.90
Sea To Summit Spark -18C down sleeping bag - Long
Delivery by 28 Oct $64.36
Sea To Summit Spark -18C down sleeping bag - Long
Delivery $39.13
Sea To Summit Spark -18C down sleeping bag - Long
Delivery $39.13
Sea To Summit Spark-18°c Sleeping Bag Yellow Long / Left Zipper
Delivery $41.99
Sea To Summit Spark -18C Down Sleeping Bag Long
Free delivery between Wed – Thu
Sea to Summit Spark -18°C / 0°F Ultra Dry Down Sleeping Bag (Long) Grey / Yellow
Free delivery between 23–30 Oct
Sea to Summit Spark Down Sleeping Bag Men's -18°C / Long
Delivery between 23 Oct – 2 Nov $9.99
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
Sea To Summit Spark Down Sleeping Bag Long / -18C/0F
Free delivery
Sea to Summit Spark Down Sleeping Bag -18C|0F - Long
Free delivery between 22–27 Oct
Sea to Summit Spark Down Sleeping Bag -18C|0F / Long
Delivery between 26–28 Oct $13.90
Sea To Summit Spark -18C down sleeping bag - Long
Delivery by 28 Oct $64.36
Sea To Summit Spark -18C down sleeping bag - Long
Delivery $39.13
| Brand | Sea to Summit |
| Shape | Mummy |
| Department | Women's |
| Long | Yes |
| Water Resistant | Yes |
