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Halt hampering humidity while you slumber.

Add some climate control to your warm-weather sleeping bag with the Sea to Summit Adaptor Coolmax Travel Liner. Whether you’re surfing couches during the summer or sliding between summery hotel destinations, this liner uses Coolmax fabric to wick away sweat and regulate temperature as you sleep. Lightweight, easily packable, and designed to stretch, this smooth, comfortable liner can be used alone or mated with a lightweight sleeping bag.

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Sea To Summit Adaptor Coolmax Travel Liner

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Here's what others have to say...

Unanswered Question

Is there a zipper or Velcro strip that...

Posted on

Is there a zipper or Velcro strip that enables one to open or close the side for entry or exit?

Size comparison

Size comparison

Posted on

S2S Adaptor Coolmax Travel Liner in stuff sack v. Nalgene bottle

5 5

Keep Your Bag Clean and Fresh

I bought this because I am working on doing a thru-hike of the PCT currently and figured it would be good to have something to prevent my indubitably nasty body from sullying my sleeping bag every night and leading to a buildup of grime and grotesque odor within the bag itself.
It is not exactly the most weight friendly bag liner I've found during my research (depending on who is reading, 9oz can be a lot or a little), but I bought it because it was on a sale and as of yet, have not been disappointed. Regulates my temperature well and gives my OCD-self a slight peace of mind knowing that I'm not going to have to contend with nasty trail offal in my actual sleeping bag, and thus be forced to wash the bag every few weeks or so.
I haven't yet had the opportunity to try it out in a 800+ down fill bag, nor in extremely cold climates (the coldest temps I've had to contend with while using this liner thus far are no lower than 35-40F) so I will pop back in with continued info once I achieve those goals.
*Bottom Line : If you are looking for a bag liner that seems to be durable, relatively light, and not the most rapid in picking up the smells of nasty body odor, it's not a bad choice. Given my experience, I will give it a five, though with more experience, that rating may very well drop. *

5 5

Great Travel Sleep Sack

I bought this bag for a summer trip to Europe in which we, for the most part, were sleeping without sheets/beds. It worked out great, the fabric is super soft and still is, it's extremely light, and it packs down quite small for how spacious it is when unraveled. It's the perfect buy for hostels, couches, floors, anywhere where you just need a sheet to sleep with. I've since used it as a liner in my mummy bag on some colder nights camping and it definitely adds some warmth.

I'm going on a trip to Africa. I want to...

Posted on

I'm going on a trip to Africa. I want to find a cool, lightweight sleeping bag I can use when I'm camping out in the back country. Can anyone who has used this bag tell me how durable it is? Is the Coolmax fabric tough enough to not rip easily? Does it collect dirt? Thanks!

Responded on

This fabric is pretty durable, like all sheets it will need to be washed every once and a while. It is an extremely soft fabric.

5 5


Awesome liner. I don't like the silk personally but I love this material. It works really well for tropical conditions and I would recommend to anyone backpacking/camping with 70+ nights or if your staying at a hostel. I also carry the marmot trestles trail bag in case the temp goes below 65(f). I also like the fact that I have a nice wicking liner for colder months. I tend to sweat.

This bag when packed is 3x5 inches. I am 6'3" 250lbs and I fit comfortably.