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Sea To Summit Thermolite Reactor

Hiking & Camping > Sleeping Bags & PadsRated: ***** by 20 reviews.

Rock/Creek Outfitters

Sea to Summit introduces "Reactor", a Thermolite® sleeping bag liner. The fabric for this liner is DuPont’s Thermolite® . It is the lightest weight Thermolite® available and Sea to Summit is the first to use this new fabric in a sleeping bag liner. Thermolite® is a hollow core fiber that provides extraordinary warmth for it's weight and remains extremely breathable. So, it's much more comfortable to sleep in and creates more warmth for its weight. The Reactor liner will add up to 15 degrees of warmth to a sleeping bag or can be used on its own as the ideal warm weather bag. It's very light and compact weighing just 8 oz (190 grams) and the packs into its own 3" x 5" siliconised nylon stuff sack.

Features:

  • Adds up to 15 degrees of warmth to a sleeping bag
  • Available in black
  • Lighter and more compact than fleece liners, but just as warm
  • Mummy shape is 82" long and 35" wide across the shoulders, tapering down to a box foot
  • Thin draw cord & tiny cord lock around the hood
  • Used alone, it's an ideal warm weather sleeping bag
  • Warmer than other synthetic fabrics
  • Weighs only 8.1 oz and packs into a 3" x 5" Sn240 stuff sack

This description was also provided by: Ramsey Outdoor

Mountain Gear

Increase the thermal value of your sleeping bag with the Thermolite Reactor Sleeping Bag Liner from Sea to Summit, or use it as your sole bag on warm weather trips. At a mere 9 ounces, the Thermolite construction affords you a high weight-to-warmth ratio by increasing your bag's warmth by 15 degrees.

Features:

  • Add warmth to an your sleeping bag or use it alone - this liner offers warmth and comfort and is breathable so you can sleep through the night without constantly adjusting
  • Pack it away in the included siliconized nylon stuff sack
  • Put a layer of protection between you and the sheets used at hostels and hotels with this lightweight synthetic sleeping sheet
  • Surround yourself in the mummy shape with a footbox and drawcord hood

REI

Introducing the Reactor® Thermolite Mummy Liner--the first to use Thermolite® from Dupont.

  • Thermolite is a hollow-core fiber that provides extraordinary warmth for its weight and remains extremely breathable
  • It's very comfortable, more compact and warmer for its weight than fleece liners
  • Adds up to 15 degrees of warmth to a sleeping bag, or can be used on its own as the ideal warm-weather bag
  • Thin drawcord with tiny cord-lock around the hood
  • Very light and compact!


SummitHut.com

Sea to Summit developed this lighter weight version of Dupont Thermolite® Base especially for the Reactor sleeping bag liner. With a box foot construction and hood, this is a more technical liner designed for outdoor use. It’s also soft, stretchy and quick drying.

Features:

  • Box Foot & hood design
  • Increases sleeping bag warmth by up to 15 F
  • Made from Dupont Thermolite® Base fabric
  • Quick drying
  • Stretchy & soft knit fabric

Moosejaw

No description provided.

Average weight:8.1 ounces
Average weight - metric:0.23 kilograms
Dimensions:82 x 35 inches
Fabric:synthetic
Material:Polyester
Packaged Size:3" x 5"
Sleeping bag shape:Mummy
Stuff sack size:3 x 5 inches
Stuff size:3 x 5 inches
Weight:9 ounces

View other products from Sea To Summit classified in Hiking & Camping > Sleeping Bags & Pads.

View all products from Sea To Summit.
View other products classified in Hiking & Camping > Sleeping Bags & Pads.

Sometimes, we can't be sure that the product is the same across the stores that offer its, so you may find the same product listed more then once on GearBuyer.com, we these list highly similar products below.

Sea To Summit Reactor- duPont Thermolite Mummy LinerSea To Summit Reactor- duPont Thermolite Mummy Liner$54.95
Sea To Summit Reactor LinerSea To Summit Reactor Liner$54.95

These are products that have been indicated being comparable to this product:

Sea To Summit Cotton Liner Travel SheetsSea To Summit Cotton Liner Travel Sheets
Hiking & Camping > Sleeping Bags & Pads
$24.95
Sea To Summit Lite Silk Liner Travel SheetsSea To Summit Lite Silk Liner Travel Sheets
Hiking & Camping > Sleeping Bags & Pads
$44.95
Sea To Summit OuthouseSea To Summit Outhouse
Hiking & Camping > Stuff Sacks
$14.95

Option Availability:

Use this chart to find which retailer offers this product in the size, color or other options that you desire. Click on the price to purchase.

Color
Black
Black
54.9554.95
Thermolite54.95

Legend

  •     - Mountain Gear
  •     - REI
  •     - Moosejaw

Notes:

Ramsey Outdoor offers this product at $54.95, but does not provide any color/size information.

Rock/Creek Outfitters offers this product at $54.95, but does not provide any color/size information.

SummitHut.com offers this product at $54.95, but does not provide any color/size information.

Sea To Summit Thermolite Reactor Reviews Summary:

RatingNumber
of Reviews
*****12
****8
***0
**0
*0
To see how this product compares to others view Sleeping Bag Reviews.

Reviews:

ABSOLUTELY EXELENT !!!

Rating:*****
OK so I got this "liner" bag as a sleeping bag when I took my good bag to cleaners and cause they messed up I was not able to get it back in time for my trip. As it was not going to be too cold I guessed that this along with my layers would suffice for the weather. I did not want to spend a grip getting another full-on bag (assuming I would eventually get mine back from the cleaners, but that is a different thing) so I decided to take a chance on this one.

I AM so satisfied and happy I did. I don't think I will ever take a full bag on a summer trip again. This kept me warm and was light and even more importantly very compact. It performed well on the initial trip and a few others so far. I have used it in the wind and while it is not designed as a windshield with a slip on cover I made from a couple of trash bags I got a super-compact lightweight bag and groundcover all in one.
This thing has held up great so far and after very close inspection I have found no defects after multiple uses, and I am a rough sleeper.
CoeManIngraham at REI on 08/19/2008

Versitile Liner, good on it's own

Rating:****
Purchased this liner to add a bit warmth to a new down bag, plus wanted to keep the bag clean. It's been a great addition to our Summer and Fall backcountry trips above 8,000' where it the temp drops off quite a bit at night. Thus far it has been versitile enough to add the extra warmth, but the stated amount of 15deg is a bit optimistic, but on warmer evenings (40-50deg) I found myself using just this liner and being very comfortable. The greatest bonus of this liner is that it is soft and very light for the amount of heat retention it has. It cleans up easy and doesn't retain much if any moisture. I've been impressed with this liner and just picked one up for my wife at the [...]. We also fly a lot and I see us taking this with us on the plane too.
xkursion at REI on 09/12/2007

Great Liner, OK on its own

Rating:****
This liner is very good. I have used it a few times in conjunction with a zero degree no-name bag that was stuffed for many months... Lets call it a 10-15 degree. Anyway, it helped it out wonderfully, keeping me very warm, and it fit well in the bag, too.

This thing is freakin' tiny when packed, which is very convenient. I fit in it pretty well, which is saying something as I am 6'5".

Additionally, I have used it multiple times by itself as an uber-light bag, and while it keeps me warm, the thin material is not wind-resistant at all, so the slight draft in my tent removes most of the warmth it collects. I am working on making a windproof shell for it, we'll see how that turns out. If so, it could be a summer bag that fits in a Nalgene!
illegallydead at REI on 03/03/2008

"If mama's happy, then EVERYONE is happy"

Rating:*****
Bought 2 of these, for the wife and for me, to keep the bags clean and help her stay warm. She gets cold even in 70+ degrees. These worked great! Comfortable, non restrictive and for her.. she went from her usual sleeping attire of socks, cuddle duds, sweat pants, long sleeve T and 2 hoodies to just socks, duds, long sleeve T and ONE hoodie. She felt warmer and slept much better, which makes her less grumpy in the morning. I felt less gross not spreading my daily dirt in my bag. Light weight.. slip it inside your bag before stuffing and you won't even notice it's there.. till you shake out your bag and it falls in the dirt. Mama was happy... So was I. Highly recommended!!
Mike at Moosejaw on 06/24/2009

"Not Leaving Home Without It"

Rating:****
Purchased this to go along with my new bag, and was pleasantly surprised during shakedown. It was between 40 and 45F outside with extremely moist conditions. Initially, I had trouble getting my toes warm, but once that was resolved, I slept like a rock, warm and toasty in my bag and liner. Actually woke up in the wee hours needing to vent because it was a little *too* warm. Given the lightweight material and other reviews, I'm hoping it will also make a good sleep solution for warmer weather. Highly recommended if you tend to get cold while sleeping; not so much if you don't.
Heather at Moosejaw on 03/18/2009

Good Piece

Rating:*****
Great product. I used it in New Hampshire a few weekends ago (1/17/09) where it got to negative temps. I have the REI Kilo Flash 40 degree bag and had the thermolite liner. I was on a thermarest prolite 3 short sleeping pad with an emergency blanket below that. I was also bundled up in clothes and even though the temp got to -10, I was warm all night. This is a great piece and I was surprised at how much warmth it added. It is very lightweight and very small. If you are a backpacker like me, you need to get this.
Tuts at REI on 01/29/2009

Not what I anticipated

Rating:*****
I wasn't expecting something so thin - once I saw it I anticipated that it wouldn't be as warm as it was supposed to be. I tried it out first at home, with the heat turned down, under a comforter I knew would not be warm on its own - this liner kept me warm and toasty, didn't make me feel confined, in fact I hardly knew it was there. I'm guessing this will make up for my thirty degree bag not really being warm as advertised, and I'm glad I picked this up.
morningLori at REI on 02/07/2008

Warm and light

Rating:*****
Really nice lightweight liner. Packs very small and adds considerable warmth for its weight. I pair this up with a lafuma 40 degree down bag and I use this combo for everything except snow camping. It did obsorb a little bit of camping smell, (campfire) but that just means its keeping the smell and smoke out of my sleeping bag. I would highly recommend this liner to anyone that uses an ultralight summer bag.
Oregon Trails at REI on 09/28/2007

very nice

Rating:*****
Very small, lightweight, and super easy to pack. It's pretty thin and I'm often afraid I'm going to rip it while I sleep because I move around so much, but it has yet to. Adds a good deal of warmth to a sleeping bag. I found it helps to secure the hood cinch around my chest at night to keep it from getting tangled around my legs. Worth it I suppose.
stumps211 at REI on 01/19/2008

Great piece of gear

Rating:*****
So I used this every night in Iraq for a year, whether sleeping on base or in the sand, and it never ripped. Since I got back (2 years ago!) I've been using the same liner, still no rips, tears, or anything like that, and that's with one full year's worth of wear and tear and washings plus 2 more years of part-time use.
Neuey at REI on 03/26/2008