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Get cold in your sleeping bag? The Sea To Summit Thermolite Reactor Sleeping Bag Liner will add up to 15°F of extra warmth to your sleeping bag. It's special Thermolite technology is lighter, warmer, and more compact than fleece. It can even be used on its own as a warm weather bag! For maximum comfort, we recommend selecting a sleeping bag that is rated at a temperature that is 20 degrees lower than the lowest temperature at your campsite.

Sea to Summit
Sea to Summit Thermolite Reactor Sleeping Bag Liner
$9
for your trip ($60 retail)
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Payment will be processed 10 days before your reservation — you may cancel or edit your order up until this date.

Get cold in your sleeping bag? The Sea To Summit Thermolite Reactor Sleeping Bag Liner will add up to 15°F of extra warmth to your sleeping bag. It's special Thermolite technology is lighter, warmer, and more compact than fleece. It can even be used on its own as a warm weather bag! For maximum comfort, we recommend selecting a sleeping bag that is rated at a temperature that is 20 degrees lower than the lowest temperature at your campsite.

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Arrive Outdoors is an outdoor experience company with a mission to create a world where you can experience the outdoors sustainably. Rent premium outdoor gear with delivery anywhere in the continental U.S.

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