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Rated 4 out of 5 by from Kept me dry I originally bought this to test if I was allergic to my sleeping bag, but after 4 uses with this liner, I don't think I'll camp without it. I woke up every morning with dew on the outside of the tent itself (dew went past my rain fly) and sometimes my sleeping bag felt a little damp. This liner kept me dry every time hands down. Plus it's comfortable. I also thought it would get all wrapped up and twisted in my sleeping bag, but what happened was that it attached to me as I twisted around in my bag so it didn't bother me at all. Well done! I wish they made a pillow case in this same material!
Date published: 2011-11-27
Rated 4 out of 5 by from Worked great for boys at scout camp Bought two for scout camp for the boys. They were eaten alive last year and slept in their sleeping bags to avoid the bugs even though it was in the upper 90's. I saw these in the local REI this year and - problem solved! Same camp, same heat, same swarm of hungry insects, but no problems - the boys LOVED these liners. No bites, and they swore that they were cooler in the bags than without. They seem delicate, but held up well. They pack down small. They were expensive, but well worth it, in my opinion.
Date published: 2013-08-08
Rated 4 out of 5 by from Prefect liner for the South This tiny little tube of cotton was just what I was looking for. Temps had been at 80F all day in Southern Florida, and the insects where out in decent numbers. I left the tent slightly open, knowing full well that this liner was meant to repell the little blood suckers. I drug my 5'11" 165lbs self into my North Face Aleutian 1S mummy bag as the temps started dropping into the low 60's. Overnight, it dropped to about 44F, I was in a 55F rated bag, and only faintly noticed having cold, sockless feet. Your results may vary. TLDR: Morning revealed that I did not have any welts from the various flying blood suckers. I was not overly hot or sweating during the night with the addition of the liner either. Not once during the night did I feel like i was wrapped up or constricted, this liner felt more like a sheet. I do recommend that you first get in the liner, then get in the sleeping bag of choice.
Date published: 2014-02-22
Rated 5 out of 5 by from Don't travel without it! I took this to the jungles of southern India and paired with Sawyer's clothing treatment came home with only one bug bite in more than two weeks! My fellow travelers looked like they had chicken pox. This is especially great when mosquito nets are not a possibility.
Date published: 2013-01-10
Rated 5 out of 5 by from A Life Lesson from a Sleep Sack... A friend of mine had this sleep sack my first year in Thailand, and I thought it was just a revolutionary idea. Here in Thailand, where it's too hot to even think about a sleeping bag, but where bugs are a part of every day life, what could be more perfect? It's my third year working in Thailand, and I purchased this sack before soon after my first. I guess my expectations for it were a little high - I'd envisioned myself stepping foot into the jungle and all manner of insects (and maybe even some smaller reptiles) retreating in fear. The jungle would be drained of insects, fleeing for their lives - unable to penetrate the forcefield provided from this sack rolled away in my pack. Perhaps this was a little hopeful, but I slept soundly in the wilderness and in my guesthouses and I figured that was enough, though I remained unsure of it's actual insect-repelling abilities. I am now sure. I left this beautiful, necessary, perfect little travel companion of mine at a guesthouse a few nights ago in the depths of the mountains to which I never plan on returning. No biggie, I thought. Ever the MacGyver, I bought some CoolMax fabric here in Chiang Mai and had it fashioned into a new sleep sack. Problem solved, no? And man, did I feel resourceful. Problem not solved. It's been three nights since I left my little green savior in the mountains. Back in Chiang Mai, in a reasonable guesthouse armed with screens, a fan, and copious amounts of mosquito repellent at night - and my body is RIDDLED with mosquito bites. I'm not naive enough to think that there was some sort of mosquito-bounty placed on my head while I was gone in the mountains. No, each itchy welt is a life lesson to me: You never really know what you love until you lose it. P.S. In case I wasn't clear, if I don't die of mosquito-related illnesses before my return home later this month, I will most certainly be reinvesting in this product.
Date published: 2013-12-08
Rated 5 out of 5 by from Great product Used this on the Camino in Spain - no problems with bedbugs the entire time. Used alone and inside sleeping bag - nice weight.
Date published: 2013-11-11
Rated 5 out of 5 by from Great for hot weather Warmth I've had this for a few weeks and have used it a couple times. The weather here is currently 70s and 80s during the day and 40s and 50s at night. This liner was excellent for napping in the afternoons/evenings when the temperature was still high, which is great, as I bought it so I wouldn't overheat during the summertime. It wasn't enough to keep me warm at night by itself however, which was good to know before not bringing a sleeping bag on a late spring/early summer trip. I didn't expect this to keep me warm in the cold, since it's made for hot temperatures, but wanted to see how versatile it is. I would say that it's probably adequate alone above 60 degrees. Insect Repellant The area in which I used this wasn't incredibly buggy, so I didn't get a great assessment of it's insect repelling performance. That being said, I didn't get bit or have any bugs around me when I woke up. Still, I can't make a call either way yet since I don't have enough experience with it. If I use it in a really buggy area I'll update this post. Size/Weight This thing packs down tiny and weighs practically nothing. It's an excellent little accessory to carry around all the time. Especially if it really does repel bugs well.
Date published: 2014-06-23
Rated 5 out of 5 by from Fit the bill I used this product on a recent trip to Haiti. It worked great. I used it on a overnight mountain trip an found it was breathable, moisture wicking and gave me peace of mind to know I had some extra bug resistance built into the fabric. Packs easily into a day pack. I also ended up sleeping in it in some questionnable beds at a hotel I stayed at. Highly recommended!
Date published: 2010-10-28
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Questions & Answers

How many degrees can we expect this to add to our bag? I know it's not specific for that, but I'm assuming it will add some warmth since it is another layer. Thanks

Asked by: AbigailRae
While Sea to Summit does not specifically list a temperature rating on the Insect Shield CoolMax Adaptor Liner, it would be fair to say that it would add about 5 degrees of warmth to your sleeping bag.
Answered by: REIservice
Date published: 2018-01-09

Does this liner have a zipper closure? If so, where is it located?

Asked by: Maureen386
The Insect Shield CoolMax Adaptor Liner has a draw string opening at the top of the bag. It does not open on the sides and does not have a zipper closure.
Answered by: REIservice
Date published: 2017-07-09

I will be using this for the camino frances in the near future and wanting to pack as light as possible. To this point does this liner have an insert for a pillow or do I need to bring a pillow case for pillows supplied by the alburgues and hostels?

Asked by: Quitobaby
The Insect Shield CoolMax Adaptor Liner does not have a sleeve for your pillow.
Answered by: REIservice
Date published: 2017-08-26

There's no mention of bed bugs. Does the insect shield repellent work against them?

Asked by: mc17
The Insect Shield CoolMax Adaptor Liner is not rated for bed bugs.
Answered by: REIservice
Date published: 2017-07-09

I'm allergic to Chrysanthemums but was wondering if this permethrin sprayed liner would be okay to use since it's embedded into the fabric?

Asked by: Jgang
We require all our vendors to comply with all federal regulations but do not have specific chemical information, unfortunately. We encourage you to contact Sea to Summit.
Answered by: REIservice
Date published: 2017-06-21

Is the permethrin repellant safe and or is it only on the outside of the liner. Concerned about it causing discomfort or deet exposure type symptoms.

Asked by: Iwannaknow
The Insect Shield treatment (permethrin) on the CoolMax Adaptor Liner is all throughout the fabric, so it is found on the inside of the liner. Permethrin is EPA registered to ensure it will not have adverse effects on people or the environment. Insect Shield products have been rigorously evaluated on multiple levels. Permetherin does not contain Deet.
Answered by: REIservice
Date published: 2018-01-09

The item says that it loses its insect effectiveness after 25 washes, or 6 months of weathering exposure, how can you add more insect repellent? It would be really disappointing to have a purchase a new one every year.

Asked by: Kenny SAR
Sawyer Permethrin would be the best way to add more insect repellent to the Insect Shield CoolMax Adaptor Liner. Permethrin is the same substance that Sea to Summit puts into the liner.
Answered by: REIservice
Date published: 2018-01-09
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