Sea to Summit CoolMax® Liner

Comfort and piece of mind while sleeping anywhere, especially in those questionably-clean hostels.



Technical Details


CoolMax (polyester)


[open] 36 x 84 in, [packed] 3 x 5 in



Stuff Sack Included



  • Breathable
  • Moisture-wicking
  • Stretchy
  • Soft
  • Compact


  • Slightly less durable than silk

Why We Like It

A sleeping bag liner is a great way to insulate yourself from hostel beds or to keep warm on a flight. While some prefer silk, I've found the CoolMax® liners are more breathable, preform better in humid climates, offer more stretch for restless sleepers, and very soft. Plus, they have amazing temperature control, keeping you cool during warm nights and warm during cool nights. The Sea to Summit CoolMax® Adaptor is amazing because it packs down 2" smaller than similar versions.

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