Marmot Lost Coast Sleeping Bag: 40F Down

Lost Coast 40F Down Sleeping Bag is lightweight, packable, and cozy for warm-weather adventures

What Our Gearhead® Experts Are Saying:

"I love how the Lost Coast 40F strikes the perfect balance between warmth, packability, and comfort. The 600-fill down keeps me cozy on mild nights, and the water-resistant Down Defender treatment adds peace of mind in damp conditions. The anti-snag zipper makes for easy in and out, and I appreciate the roomy footbox for extra comfort. Whether I’m car camping or backpacking to new sites every night, this bag is my go-to for lightweight warmth."

When our adventures take us beyond the parking lot, the Marmot Lost Coast 40F Down Sleeping Bag delivers lightweight warmth without the bulk. Designed for versatility, this down-insulated mummy bag is roomy enough for nights under the stars but packable enough for multi-day treks. With a soft, 100% recycled ripstop shell and liner, it offers durability without excess weight, making it an ideal companion for warm-weather backpacking and road trips alike.

The 600-fill-power down provides lofted warmth with a water-resistant Down Defender treatment that keeps us dry in damp conditions. The anatomically designed footbox enhances warmth and comfort, while an anti-snag zipper allows for easy ventilation on milder nights. An internal stash pocket keeps essentials close, and the included storage sack helps maintain loft when not in use. Whether we’re setting up a plush basecamp or moving to a new site each night, the Lost Coast ensures restful sleep after a day of adventure.

Details

• Lightweight down sleeping bag designed for backpacking and warm-weather camping
• 600-fill-power down with Down Defender offers lofted warmth and water resistance
• 100% recycled ripstop shell and lining reduce environmental impact
• Anti-snag zipper allows for smooth entry, exit, and ventilation adjustments
• Anatomically designed footbox increases warmth and comfort
• Internal stash pocket keeps small valuables warm and accessible
• Includes a storage sack and stuff sack for easy packing and storage
• Item #MARZ9YA

Tech Specs

Material

recycled polyester

Insulation

600-fill down

Shape

mummy

Zipper

full-length

Shoulder Circumference

65in

Foot Circumference

50in

Pockets

internal stash

Venting

full-length zipper

Degree

40°F

European Norm/ISO Comfort Rating

44°F

European Norm/ISO Lower Limit Rating

36°F

Claimed Weight

2lb 1oz

Manufacturer Warranty

limited lifetime