Sea to Summit
Spark Women's Down Sleeping Bag
Sold by the people who make it — no third-party seller in between.
Manufacturer list price (MSRP)
$349.00
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Overview
Spark Women's Down Sleeping Bag Built for women who want minimal weight but maximum comfort in their adventures, the Women's Spark lineup demonstrates Sea to Summit's 100% commitment to building a sleeping bag that's perfect for you. Women's specific shape and body mapping result in warmth and comfort without the weight.
Specs
- Brand
- Sea to Summit
- Weight
- 423 g · 14.9 oz
- Temp rating
- 39 °f | 4 °c (ISO 23537, tested by Sea to Summit)
- Fill
- rds certified, 850+ fillpower goose down with a non-pfc ultra-dry down treatment
- Shape
- not published by the manufacturer
- Fill Material — Source: manufacturer · checked 2026-09-11
- Shape — Source: manufacturer · checked 2026-09-11
- Temperature Rating F — Source: manufacturer · checked 2026-09-11
Weight vs. category
51% lighter than the category average.
How it measures up
Against every one of the sleeping bags & quilts in the RidgeNote register with a published figure. Manufacturer-listed; sources and dates are on this page.
- Weight
- 14.9 oz (423 g)
- Lighter than 83% of 24 weighed · #4 lightest
- -54% vs the median 2.04 lb
- Price
- $349.00
- Cheaper than 55% of 29 priced · #13 cheapest
- -4% vs the median $364.00 · $23.39/oz (median $8.20/oz)
- Temperature rating
- 39 °F
- Lower than 3% of 38 rated
- median 20 °F
The lightest of the sleeping bags & quilts on record is Gossamer Gear Cumulus x Gossamer Gear Aerial 330 Sleeping Bag at 11.6 oz — 94 g less for $50.00 more.
The cheapest is Sea to Summit Boab Synthetic Sleeping Bag at $124.00 — $225.00 less and 887 g heavier.
RidgeNote verdict
Similar — lighter or cheaper
Related reading
What Is the Lightest 20 Degree Sleeping Bag in 2026
See how NEMO, Kelty, and Sea to Summit 20 degree bags compare by weight, price per ounce, and rank across the current shelf for 2026.
What's the Lightest Ultralight Sleeping Bag Worth Buying in 2026?
RidgeNote ranks 24 ultralight sleeping bags and quilts by published weight, from 11.6 oz to 72.0 oz, so you know what going lighter costs in ounces.
What Is the Lightest 30 Degree Sleeping Bag in 2026?
See which 30 degree sleeping bags and quilts weigh least, ranked by grams, ounces, and price per ounce across the full shelf.
Manufacturer list price (MSRP)
$349.00