The Lost Coast Summit 40 Down Mummy Sleeping Bag is your go-to companion when weight and warmth matter on the trail. Crafted for ultralight adventures, it features 600-fill-power down sleeping bag insulation treated with Down Defender for added water resistance, keeping you dry even in damp conditions.
- Built from post-consumer recycled polyester shell and lining for sustainable comfort
- Mummy shape and anatomic footbox retain heat while allowing relaxed movement
- Main zipper includes antisnag slider for seamless access and easy ventilation
- Internal stash pocket keeps essentials close at hand
- Includes stuff sack and storage bag for convenient packing and storage
ISO-tested to keep you cozy down to 36°F, this is the best down sleeping bag for backpacking when facing chilly mountain nights. Want to know how to maintain your sleeping bag for long-term performance? Keep it stored loosely, and spot clean gently with mild soap.
Scott Howard (verified owner) –
Super cozy and light! I took this on a 4-day trek and it performed beautifully even in the cold. A truly high-quality sleeping bag for cold weather.
Todd Perkins (verified owner) –
Love the mummy shape and warmth. It packs down small and fits in my backpacking gear setup with ease.
Courtney Gray (verified owner) –
Read tons of reviews of Lost Coast 40 sleeping bag before buying — glad I did! The warmth and comfort exceeded expectations on my early spring hike.