Lost Coast 15

Expand your campsite horizons with the packable comfort of the Marmot Lost Coast Down 15° Sleeping Bag. Designed for backpacking or car camping alike, this lightweight down mummy bag offers the perfect balance of warmth, durability, and eco-conscious materials. Its 600-fill-power down provides reliable insulation, while a recycled shell and liner deliver sustainable toughness for years of adventure. Features: RDS-certified 600-fill-power down with Down Defender treatment for improved water resistance in damp conditions 100% post-consumer recycled polyester shell and lining minimize environmental impact Main zipper with anti-snag slider for smooth operation and easy ventilation Anatomically designed footbox with wrap-around construction enhances warmth and comfort Draft collar helps prevent heat loss on cold nights Internal stash pocket keeps small items secure and within reach ISO-tested for accurate and dependable temperature ratings Includes both a stuff sack and a storage bag for convenient packing and long-term care Specifications — Regular Length: Temperature Rating: 15°F / -9°C Tested Comfort: 24°F / -4°C Tested Limit: 12°F / -11°C Fill Type: 600-fill-power down (RDS-certified, Down Defender treated) Shell Fabric: 100% Recycled Polyester Ripstop Liner Fabric: 100% Recycled Polyester Shape: Mummy Zipper Location: Left zip Shoulder Girth: 65 in (164 cm) Hip Girth: 62.6 in (159 cm) Footbox Size: 50 in (127 cm) Stuff Sack Size: 15.0 x 7.9 in (38 x 20 cm) Weight: 2 lbs 15.7 oz (1,353 g) Fits: Sleepers up to 6 ft (183 cm) Style Number: M15415 Includes: Stuff sack and storage sack Specifications — Long Length: Temperature Rating: 15°F / -9°C Tested Comfort: 24°F / -4°C Tested Limit: 12°F / -11°C Fill Type: 600-fill-power down (RDS-certified, Down Defender treated) Shell Fabric: 100% Recycled Polyester Ripstop Liner Fabric: 100% Recycled Polyester Shape: Mummy Zipper Location: Left zip Shoulder Girth: 67 in (169 cm) Hip Girth: 64.6 in (164 cm) Footbox Size: 52 in (132 cm) Stuff Sack Size: 15.0 x 7.9 in (38 x 20 cm) Weight: 3 lbs 3.1 oz (1,449 g) Fits: Sleepers up to 6 ft 6 in (198 cm) Style Number: M15416 Includes: Stuff sack and storage sack