Cocoon MummyLiner Thermolite
Best lightweight thermal layer for dedicated backcountry backpackers.
This ultralight liner boosts thermal efficiency by over 11 degrees, making it a versatile upgrade for any sleep system. Its moisture-wicking, recycled fabric blend dries rapidly, ensuring comfort in damp conditions while remaining compact enough for the most weight-conscious adventures.
$109.95
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Who it's for
- Ultralight backpackers seeking extra warmth without adding bulk
- Active sleepers who tend to overheat or sweat during the night
- Practical campers wanting to extend the lifespan of their gear
Who should skip it
- Restless sleepers who prefer a spacious rectangular cut
- Sensitive users bothered by clingy fabrics and static sparks
- Rugged adventurers who prioritize durability over a soft fabric feel
Performance breakdown
Thermal efficiency
Significant warmth boost for such a lightweight, packable layer.
Packability
Disappears into your pack at a mere six by three inches.
Moisture management
Hollow-core fibers excel at pulling sweat away during humid nights.
Weight-to-warmth ratio
An ultralight essential that punches well above its weight class.
Ergonomic fit
Contoured hood and foot box prevent uncomfortable fabric bunching.
Material durability
Ripstop silk offers decent longevity, though requires careful handling.
Key Specs
Dimensions
95 inches x 36 inches x 22 inches
Packing Size
6 inches x 3 inches
Weight
5.6 ounces
Material
Ripstop Silk and Thermolite EcoMade
Warmth Added
11.3 degrees Fahrenheit
Machine Washable
Yes
Closure Type
Drawstring hood
Know before you buy
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Ask Metto anything about the Cocoon MummyLiner Thermolite before you decide.