Sea to Summit Reactor Extreme Liner

Sea to Summit Reactor Extreme Liner is rated 4.7 out of 5 by 9.
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4.6 Star Rating

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Product Description Item No.   10099067

The Sea to Summit Reactor Extreme Thermolite Liner. Increases sleeping bag performance by up to 25° F (15° C) with super-insulating 110g/m2 Thermolite fabric. Spacious design allows for a comfortable night's sleep, even when the mercury plummets.

FEATURES of the Sea to Summit Reactor Extreme Liner

  • Thermolite construction throughout
  • Mummy shape with a box foot
  • Draw cord hood with mini cord lock
  • Packs into its own Ultra-Sil stuff sack

- + Product Specifications
Best Use: Camping
Weight: 14 oz
Dimensions: 84 x 36 in.
Width: 36 in.
Length: 84 in.
Product Technology: Sea to Summit THERMOLITE

THERMOLITE is a high loft synthetic insulation. It features hollow-core and solid core fibers, which combine to provide lightweight warmth that stands up to constant use. When placed inside the Air Sprung Cells of Sea to Summit sleeping pads, it prevents heat loss from your body to the ground.

Check Out All THERMOLITE Products >

Rated 5 out of 5 by from Gives you that little extra warmth! I purchased this liner several months ago to take to Jasper and Banff National parks in Canada in mid June. The temps were to get as low as 35 degrees the first night we were there so we opted to pull them out and give them a try. They worked great and kept us warm that night. We had sleeping bags but I prefer to always use a liner with my bag most of the time. This liner definitely adds to the overall warmth you will get than just using your sleeping bag. If you are questioning is it worth the price to pay I believe it is for a good warm nights sleep.
Date published: 2018-06-27
Rated 4 out of 5 by from Nice and toasty This liner will keep your bag clean and keep you warm. I don't think it adds 25 degrees to your bag but I would give it 5 to 10 degrees. It is really soft and comfortable inside of a bag. I do miss the slick feeling of the bag material itself but it's just a personal preference. If you want to stretch the temp ratings of your bag or do winter camping I would pick up one of these.
Date published: 2015-01-25
Rated 5 out of 5 by from Flat out helps increase warmth for any bag This is exactly what I wanted. Keeps my bag clean and adds warmth to my bags. Maybe not the full 25 degrees, but I sleep cold so hard to say. I am a big guy and their is tons of room.
Date published: 2013-01-14
Rated 5 out of 5 by from Sheet Liner and Sleeping Bag-in-1 I keep this liner with me whenever I travel. It acts as a buffer between me and the hostel bunk with the added bonus of actually being pretty warm on it's own. I've been out hiking a couple of times in the warmer months and it was all I really needed for a sleeping bag; kept me plenty warm. I haven't had the opportunity to use it in full on cold weather with a heavier bag.,,,,I would heartily recommend this to anyone doing a single bag trip; it's kept me warm on frigid airplanes, given me something to sleep in on long layovers and does a great job for warm weather camping.
Date published: 2012-04-20
Rated 4 out of 5 by from It works for its purpose but not as a seperate stand alone bag This adds some warmth to a bag and keeps my bag clean. However it provides absolutely no warmth on its own so don't buy it as a summer bag or expect to use it alone. Granted they don't market it for that ,but lots of people seem to think it will work for that and it doesn't. Also it is super long I would have never guessed. I am 6' and I can close it around the top of my head and have a foot or so to spare!
Date published: 2011-10-18
Rated 4 out of 5 by from Great warm weather bag. I swapped out my heavier and bulkier sleeping bag and just took this on my last trip. Did the job well, comfortable and very eary to wash. Fits nicely in the provided stuff sack also. Would recommend for you warmer weather camping trips!
Date published: 2010-12-28
Rated 5 out of 5 by from Does what it says what it will do Packs down to a super small size, also. Used on a 35 degree night in the Uwharrie National Forest this weekend with a Slumberjack Odysee bag. First, the liner adds tremendous comfort to any bag - it's soft and stretchy and conforms to you (I'm 5'10" 250 pounds and like to move around at night when I sleep). I wasn't sure the Slumberjack would hold up to their claim that night and brought this. I'm sure it added 15-20 easily. Worth the cost.
Date published: 2010-11-15
Rated 5 out of 5 by from I'm pretty sure Sea to Summit made these with some sort of eldritch magic.... When I first got my liner, I thought for sure it would not last very long or be very warm. I was wrong on both counts. It's very very comfortable and adds a ton of warmth to any bag. It also works well on its own as a warm weather bag and it packs down to a super tiny size. It's also very stretchy.
Date published: 2010-09-21
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