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    Sea To Summit Thermolite Reactor Extreme Sleeping Bag Liner

    91%
    of respondents would recommend this to a friend
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    Color: Orange
    Orange
    Size: Mummy
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    Description
    Features
    Specs
    Video
    Description

    The THERMOLITE® Reactor™ Extreme liner is Sea to Summit’s warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. In warmer weather, it can be used a ‘stand alone’ sleeping bag.

    The hollow core fibers of the THERMOLITE® fabric work like hollow polar bear or caribou fur – along with the knitted structure, this traps plenty of insulating air. Super soft and amazingly stretchy, the Reactor Extreme uses a heavier version of THERMOLITE®  to provide extra warmth for an incredibly comfortable night’s sleep.

    Use one to build your cooler-weather sleep system and to help to keep your sleeping bag clean, too.

    Features
    • Stretchy, Thermolite® fabric is incredibly comfortable
    • Works like your favorite cold-weather base layer to trap insulating air and increase warmth
    • Easy care – no special soap is needed
    • Significantly improves the thermal performance of your sleeping bag
    • Comfortable stretchy fabric
    • Keeps sleeping bag clean
    • Machine wash and air dry - Avoid fabric softeners & dryer sheets to maintain wicking performance
    • Packs into its own Ultra-Sil™stuff sack
    Specs
    •  Thermolite® 110g/m² fabric
    • Up to 25°F / 14°C
    • Comes with Ultra-Sil stuff sack
    • Thermolite polyester fabric
    • Dimensions: 82 in / 208 cm
    • Stuff sack size: 6.5 x 4.5 in / 17 x 11.5 cm
    • Weight: 14 oz / 399 g

    Video

    Review Snapshot

    4.5

    11 ReviewsWrite a Review
    91%
    of respondents would recommend this to a friend

    Ratings Distribution

    Reviewed by 11 customers

    Instant Heat Warm and worth the extra weight

    Submitted 2 years ago

    By Kimhodg

    From West Jefferson, nc

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    Turns up the heat instantly worth the extra weight

    Bottom Line Yes, I would recommend to a friend

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    Worked well

    Submitted 4 years ago

    By TNTim

    From Murfreesboro

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    My bag is only comfortable to mid-forties so I was glad to have this on nights in the thirties. Unlike an earlier reviewer, I found it easily fits back into its stuff bag, stuffing it in like a sleeping bag rather than trying to fold and pack it in. It was also nice to have this light thing to wrap around me while overnighting in an airport :)

    Bottom Line Yes, I would recommend to a friend

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    OK Bag Liner, Could Use A Zipper

    Submitted 8 years ago

    By MorningDove

    From NC

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    I bought the Sea to Summit Reactor Extreme Thermolite Sleeping Bag Liner to use inside a (down) bag for sub zero weather. It's soft and lightweight and comfy. Unfortunately, the sleeping bag I had was kinda drafty and unusable in sub zero temps....so I ended up using the liner during much milder weather....seriously, just the liner alone. I love how it packs down so small in size. I stashed it in my vehicle, for backseat naps during long trips in milder temps (and with a wool blanket when it gets a little cooler). This liner provides a little bit of extra warmth...I think the word "Extreme" in this product's title is inaccurate, though, lol! What would make it Perfect would be a zipper, to make it easier to in and get out of. A zipper with a protective thermolite cover flap, please.

    Bottom Line Yes, I would recommend to a friend

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    Wicked Warm

    Submitted 9 years ago

    By PalauGrl

    From Troy, NY

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    This liner is awesome. I have the thermolite reactor, that I also bought from LLBean, which only gives up to 14 degrees in warmth, and I love it. I needed another one for my daughter since we were going on winter camping trips and her fleece liner wasn't cutting it. This liner proved to be the way to go, especially since I really like the other one I have. My daughter loved how small it packed up and it didn't take a lot of room in her pack or add on a lot of weight. She was really warm all night. I would highly recommend this to anyone who is doing camping in the cold and wants an extra layer of warmth without sacrificing additional space or weight on your pack.

    Bottom Line Yes, I would recommend to a friend

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    Comfortable

    Submitted 9 years ago

    By One Step

    From Meredith

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    I found this to be large and comfortable. The reason I chose this particular model from Sea and Summit was because I am specifically using it to increase the warmth of one particular light weight sleeping bag. It will also be a liner to keep my other sleeping bags clean. You do need to crawl in from the top but I am used to that. Since there is no opening on the side it keeps you warmer.

    Bottom Line Yes, I would recommend to a friend

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    Pain to deal with

    Submitted 11 years ago

    By CoachDaley

    From ga

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    This bag does do a good job of keeping you warm. But when you get into your sleeping bag you sit down on it, get your legs in and then zip it up to the comfort level you desire. However, using this liner you cannot operate that way because it doesn't have a zipper. You must put yourself into it from top to bottom as it is actually a giant sock! Once you do that your hands/arms are restricted when getting into your regular bag. Also, if you need to move around or get out for a potty break the frustration just gets worse as you have to wrangle your arms up out of the top of this liner, then operate your bag zipper. After that you have to stand up so the liner falls to your feet before you are free of it. I'll be finding a seamstress that can add a zipper at least 3/4 the way down the top. Otherwise, this liner feels like being in a trap. Find one with a zipper and don't get this one.

    Bottom Line No, I would not recommend to a friend

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    AMAZING

    Submitted 13 years ago

    By Stan

    From Cadyville, NY

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    For the first time with temps below freezing, I was warm! Highly recommend!

    Bottom Line Yes, I would recommend to a friend

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    Great for long airplane trips

    Submitted 13 years ago

    By EllyTraveler

    From Maryville TN

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    As an airline crew member, I use this sleeping bag liner rather than a bulky blanket in the crew bunks when working or in the cabin when I am a passenger. Standard blankets can slide off. With the bag liner, I can roll over and never lose my cover. When I am finished, I just stand up and drop it to the floor, then pack it in the small bag. It washes well too.

    Bottom Line Yes, I would recommend to a friend

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    great item

    Submitted 13 years ago

    By LDCal

    From California

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    Super helpful way to add warmth without bulk. Really soft too!

    Bottom Line Yes, I would recommend to a friend

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    radiant

    Submitted 14 years ago

    By Kisa

    From Colorado Springs

    Verified Reviewer

    Reviewed at

    L.L. Bean - BV

    In the store I placed my hand inside the bag and could feel the heat from my hand being radiated back to me; it felt very warm. In the field the bag works well, feels very cozy, and added about 10-15 degrees to my down bag. It was especially helpful in keeping my feet warm. And it's perfect as a warm weather sleeping bag on its own in weather over 60-65 degrees.

    Bottom Line Yes, I would recommend to a friend

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