Down Fill
Lost Coast 5 Sleeping Bag (-15°C)
Regular price
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Down Fill
Lost Coast 5 Sleeping Bag (-15°C)
Regular price
- Unit price
- / per
Sleeping Bag Size Guide
Find the right Marmot sleeping bag for your next adventure. Choosing the correct length and shape helps maximise warmth, comfort and sleeping efficiency.
Men's & Unisex Sleeping Bags
Marmot offers several sleeping bag shapes and lengths. Available sizes vary by model.
| Bag Shape | Short | Regular | Long | Long X-Wide |
|---|---|---|---|---|
| Semi-Rectangular | Yes | Yes | Yes | Yes |
| Mummy | — | Yes | Yes | Yes |
| Slim Mummy | — | Yes | Yes | — |
This table shows Marmot's general size categories. Not every sleeping bag is available in every size.
Women's Sleeping Bags
Women's-specific sleeping bags may have different proportions and insulation distribution to suit their intended fit.
| Bag Shape | Regular | Plus | Long |
|---|---|---|---|
| Mummy | Yes | Yes | Yes |
| Slim Mummy | Yes | — | Yes |
Choosing the Right Length
Sleeping bags should provide enough space for you to lie comfortably without excessive empty space around your body.
| Size | What to Know |
|---|---|
| Short | Available in selected styles for shorter sleepers. Check the product's maximum user height. |
| Regular | The standard length option. Check the individual model's recommended maximum user height. |
| Long | Many Marmot men's and unisex Long sleeping bags accommodate sleepers up to 198 cm (6 ft 6 in). |
| Long X-Wide | Offers additional width where available. Check the individual bag's shoulder, hip and footbox measurements. |
| Women's Plus | A roomier fit option in selected women's sleeping bags. Check the model-specific dimensions. |
Important: Maximum user height and internal dimensions can vary between sleeping bag models. Always refer to the specifications for the exact sleeping bag you are purchasing.
Understanding Sleeping Bag Shapes
Mummy: A tapered design that reduces excess space and helps retain warmth. Popular for hiking, backpacking and colder conditions.
Slim Mummy: A more closely fitted mummy shape designed to minimise unnecessary space and weight.
Semi-Rectangular: Offers additional room through the body and legs, making it a comfortable option for sleepers who prefer more freedom of movement.
How to Choose Your Sleeping Bag
- Check your height: Compare your height with the maximum user height listed for the sleeping bag.
- Consider your sleeping position: If you move frequently or sleep on your side, you may prefer a roomier shape.
- Check the width: Look at the shoulder, hip and footbox measurements if you prefer additional space.
- Choose the appropriate warmth rating: Consider the lowest temperatures you expect to encounter and the bag's published temperature ratings.
- Consider packability: Weight and packed size are important when carrying your sleeping bag on multi-day adventures.
Getting the Best Fit
A well-fitting sleeping bag should allow comfortable movement without leaving excessive unused space that needs to be warmed by your body.
If you are near the maximum recommended height for a particular size, compare the next length up before purchasing.
Fit tip: Sleeping bag size is separate from temperature rating. Always check both the fit specifications and the manufacturer's published temperature information before choosing your bag.
Please note: This guide follows Marmot's official sleeping bag sizing categories. Exact dimensions and available sizes vary by model.
Availability
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Description
Expand your campsite horizons beyond your car with a pack-friendly down bag that's packed full of comfort. Lofty yet light, this down mummy bag is compact enough to carry on your back yet roomy enough for nights cozied up in the trunk. The 100% post-consumer recycled ripstop shell and liner can handle extended use on the trail, while lightweight 600-fill down keeps you warm—whether you're setting up a plush off-grid basecamp for the weekend or moving to new sites every night. An anti-snag zipper slider makes getting in and out a breeze and lets you easily dial in your comfort throughout the night. The internal stash pocket is perfect for keeping small valuables safe and warm with the help of your body heat.
- RDS-certified 600-fill-power down with Down Defender for improved water resistance in wet conditions
- 100% post-consumer recycled polyester shell and lining fabric reduce environmental impact
- Main zipper with anti-snag slider provides added ventilation and easy access
- Anatomically designed footbox with wrap-around construction increases warmth
- Internal stash pocket
- Draft collar prevents heat loss
- ISO-tested for a reliable temperature rating
- Stuff sack and storage bag included
- Standard length fits sleepers up to 6'0"
Bag Temperature Celcius: -15°C
Product Care: Machine Wash Cold, Use Liquid Detergent, Do Not Use Powdered Detergent, Gentle Cycle, Tumble Dry Low, Do Not Iron, Do Not Bleach, Do Not Dry Clean, Do Not Use Fabric Softener, Rinse Twice, Do Not Store Wet
Tested Comfort: 14°F / -10°C
Tested Limit: 0°F / -18°C
Footbox Size: 50.0 in, 127 cm
Hip Girth: 62.6 in, 159 cm
Includes Compression Stuff Sack: NO
Includes Storage Sack: YES
Includes Stuff Sack: YES
Shoulder Girth: 65 in, 164 cm
Stash Pocket: YES
Stuff Sack Size: 16.1 x 9.4 in, 41 x 24 cm
Style Number: M15418
Product Weight: 1,885.0 g
Zipper Location: Left Zip
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