- Women-specific shape and body mapping result in warmth and comfort without the weight
- Women-specific fit: narrower at the shoulders (for reduced weight) and wider between the hips and knees to allow for a natural, side-sleeping position
- RDS-certified, 850+ fill-power goose down with a non-PFAS Ultra-Dry Down treatment for maximum thermal performance
- Ultralight, breathable 10-denier nylon liner and a 10-denier shell with a non-PFAS durable water repellent (DWR) provide comfort and shed moisture
- Hood and footbox have a highly water-resistant, breathable fabric for extra moisture protection
- Technical hood and zipper draft tube prevent precious warmth from escaping
- Technical hood and anatomic footbox provide excellent warmth retention without the claustrophobic feel of some sleeping bags
- Full box baffles for maximum warmth
- YKK #5 zipper with zipper plow provides reliable, snag-free operation
- Couples can zip the full-length zipper to a compatible unisex Spark (not included) for extra comfort and thermal efficiency
- Sea to Summit Guarantee is offered for the lifetime of this product
Imported.
Temperature ratings are intended as a guideline to help you compare products, rather than a guarantee of warmth, since many different factors contribute to your comfort while you sleep. Backpacking bags are typically rated for temperature according to an independent testing protocol—currently International Organization for Standardization (ISO) 23537, though some older items followed European Norm (EN) 13537. Testing is based on a person wearing one base layer and a pair of socks, sleeping on an insulated surface with a minimum R-value of 5.38.
Each bag then gets 2 ratings: the Comfort rating is the lowest temperature at which the bag will keep the average "cold sleeper" comfortable, and the Lower Limit rating is the lowest temperature at which the bag will keep the average "warm sleeper" comfortable. Some brands determine their own temperature rating by aligning to the Comfort rating for women’s bags, to the Lower Limit rating for men’s bags, or somewhere in the middle for nongendered bags.
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