Sea to Summit Extreme Sleeping Bag Liner
Best price now
$55.22at BackcountryChecked Nov 12
Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
Prices are checked against each store and labelled with when. Store links may earn us a commission. Price via Klarna.
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The Sea to Summit Extreme Sleeping Bag Liner is a mummy-shaped liner made from a stretchy nylon knit that adds warmth and keeps the bag itself clean. It is the warmest liner in Sea to Summit's line, aimed at cold sleepers and shoulder-season campers who want extra degrees without a second bag. Against silk or cotton liners it trades breathability and packability for warmth and stretch, and it weighs more than a plain silk liner. Owners treat it as a cheap way to extend a three-season bag rather than a standalone sleep system.
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Lowest price we've seen: $55.22 on Nov 13 at Backcountry. Tracked across 1 store since Nov 13.
Owners use it to push a three-season bag into colder nights and praise the stretch and added warmth. Some find it heavier and less breathable than a silk liner, and a few say it feels clammy on warm nights.
The Sea to Summit Extreme Sleeping Bag Liner is a liner for sleeping bags. It has a mummy shape and an outer material of nylon.
It is listed as a 3-season sleeping bag.
