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Sea To Summit
Thermolite Reactor Plus Compact-Length Mummy Liner

4.647058823529412 out of 5 stars
34 Reviews

Out of Stock

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Thermolite Reactor Plus Compact-Length Mummy Liner

Extend the life of your sleeping bag and trap a little extra warmth with the Sea To Summit Thermolite Reactor Plus Compact-Length Mummy Liner. Built with insulating Thermolite fabric, this liner traps heat without over-bulking your pack. Furthermore, it keeps the inside of your bag clean and gives it a break from the wear and tear of normal use.

Details

  • Sleeping bag liner adds a little extra warmth to colder nights
  • Drawcord hood for facial protection
  • Comes with lightweight Ultra-Sil stuff sack
  • Item #STS0114
Material
Thermolite (80g), [core and foot box] Thermolite (110g)
Shape
mummy
Degrees Added
20 F
Claimed Weight
9.3oz
Manufacturer Warranty
lifetime

Overall Rating

4.5 based on 34 ratings

Review Summary

1 Stars - 0 reviews
2 Stars - 1 reviews
3 Stars - 1 reviews
4 Stars - 7 reviews
5 Stars - 25 reviews

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5 out of 5 stars

November 7, 2023

Namaste from Nepal

[This review was collected as part of a promotion.] My daughter and I just returned from five weeks of trekking in Nepal. The liner saved ours gizzard for many nights over 15,000 feet in Nepal especially in Gokyo and Gorak Shep. There was ice on the inside of our windows in the tea houses. It was miserably cold everywhere except inside our toasty sleeping bags—but without the liners it wouldn’t have been enough.

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Ellen H.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

August 25, 2023

Bolivia 2023

[This review was collected as part of a promotion.] I took this sleeping bag liner with me to Bolivia for 4 climbs. The lows got down to the single digits. I found the liner to be warm and comfortable. It definitely adds an extra level of warmth to the sleeping bag. It also keeps my bag clean inside. It is easily washable and packs down small. Great product as you would expect from Sea To Summit!

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Casey B.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

June 12, 2023

Outstanding thermal layer for emergency

[This review was collected as part of a promotion.] Outstanding thermal layer for emergency bivy system.

stephen d.
Sea to Summit

Originally reviewed on Sea to Summit

4 out of 5 stars

June 12, 2023

Bag Liner

[This review was collected as part of a promotion.] Wound up getting sopping wet on a motorcycle ride in Northern New Mexico and this liner helped beat back the hypothermia symptoms. I slipped into the bag in my motel room bed and it warmed me right up and chased the shakes away. It fits well as a solo sleeping bag within my ultralight ethos when adventure motorcycling on remote trails.

chris o.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

April 3, 2023

Toasty

[This review was collected as part of a promotion.] When I crawled into this on a cold night (below freezing), I was amazed at how comfortable I was. Paired with my 20° quilt, I didn't feel cold at all. It does have a weird smell at first, but that went away

Serein L.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

November 8, 2022

Perfect for a Grand Canyon float trip

[This review was collected as part of a promotion.] i used this liner on its own for the hot nights at the beginning of a fall Dory trip down the Grand Canyon. As the nights cooled off during our three week journey I used it inside my summer Sea to Summit sleeping bag. I was very comfortable the entire trip

Pamela M.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

October 12, 2022

Liner that works!

[This review was collected as part of a promotion.] This liner saved me from an unexpected cold front that pushed through camp overnight. I woke up shivering and quickly grabbed the liner and climbed in. Made my campout a livable one, not miserable one!!

Jeremy G.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

October 8, 2022

Perfect for fall shoulder season in NC

[This review was collected as part of a promotion.] Compresses smaller than expected for thermal material. Compact size fits great up to my neck baffles in a 15degree Phantom MH bag. Protection from the fabulous Ghost Whisperer fabric an added plus!

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Ed B.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

August 23, 2022

A great addition to my

A great addition to my 50deg quilt for nights when it gets a little chillier. It packs small so it's great to have on hand just in case. The combination of my quilt and liner combined are a lot smaller than a sleeping bag. Soft

Amber C.
Sea to Summit

Originally reviewed on Sea to Summit

5 out of 5 stars

June 15, 2022

Exactly what I was hoping for

[This review was collected as part of a promotion.] I use this liner in fall and spring so I only need one bag. The material is soft and quiet warm. I am very happy with my purchase. The added comfort from the material is a plus. I would recommend the liner to anyone who wants to get a few more degrees from their bag. I have found it limits the amount your skin touches the sleeping bag thus enabling you to wash your bag less often and making your bag last longer.

Malcolm L.
Sea to Summit

Originally reviewed on Sea to Summit