SKU: 34114421068

Sea To Summit Reactor Lightweight Liner - Regular

$62.96 $69.95
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Shipping Estimate
USA
  • USA
  • CAN

Ships within 48 hours · Estimated delivery Jul 20 - Jul 25

Promo Codes Available:

For Your Every Summer RSVP, with Code: SUMMER15

Description

Sea To Summit Reactor Lightweight Liner - RegularOptimized for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite Pro fabric, which uses infrared absorbing ceramic pigments and hollow core fibers to trap body heat. Adding up to 4C 7F of warmth with minimal bulk, its ideal for ultralight expeditions. Stretch knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odor control, its quick drying,

Optimized for minimal weight and maximum warmth, the Reactor Lightweight enhances sleep system performance with advanced Thermolite® Pro fabric, which uses infrared-absorbing ceramic pigments and hollow-core fibers to trap body heat. Adding up to 4°C|7°F of warmth with minimal bulk, it’s ideal for ultralight expeditions. Stretch-knit fabric and articulated arm openings ensure unrestricted mobility. Treated with HeiQ Fresh odor control, it’s quick-drying, machine washable, and helps prolong your sleeping bag’s lifespan by reducing wash frequency.

Best Use: Backpacking, Cycle touring, Paddle touring

Features

  • Lightweight and insulative, Thermolite® Pro technology with hollow-core fibers and infrared-absorbing pigments enhances warmth with minimal pack size
  • Freedom to Move – Stretch-knit and shaped arm openings allow unrestricted movement, providing natural comfort throughout your sleep
  • Technical Shape and Hood – Ergonomic design with a fitted hood delivers optimal warmth and comfort without extra weight or bulk
  • Fits any sleeping bag - Stretch fabric means the Reactor Liner fits any shape of sleeping bag
  • Stay Fresh Longer – HeiQ Fresh odor control technology keeps the liner fresh after extended use
  • Sleep System Integration – Snap connectors at the shoulders easily pair with Sea to Summit sleeping bags for quick, hassle-free entry and exit
  • Easy to Keep Clean – Machine washable construction simplifies care and reduces wear on your sleeping bag over time
  • Lower Impact Materials – Crafted with certified recycled fibers and bluesign APPROVED materials to minimize environmental impact

Tech specs


 Regular
Weight 9.0oz
Dimensions 76.0 x 31.5 in
Packed Size 3.9 x 7.1 x 3.9 in

Material(s)
100% Post-Consumer Recycled Polyester; Stuff Sack: 100% Polyester

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 34114421068

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4.8 ★★★★★
Based on 17 reviews
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E
Verified Purchase
Elaine Thompson
Massapequa, US
★★★★★ 4
It's a nice Crossbody bag.
Color: Coffee
The Iswee Soft Leather Cross Body Bag is a really nice Bag, and I love it. but, the front pocket has a Magnet that's supposed to keep it closed, but the Magnetic Closure doesn't work, therefore I can't use that pocket. I've taken it to a couple places to maybe have a new magnet put in, but they said they couldn't do it because of the cloth lining. I've not given up yet trying to find a place to fix or replace the magnet. Like I said, its a very nice bag, and I Love everything else about it. It has a lot of different pockets which is great. I'm using the front zipper pocket for phone key fob and phone. I do love all the pockets it has because I have a place for everything, and when I need something like my Inhaler, I know exactly where I can quickly get it. I also Love that it has 2 crossbody straps, but my favorite one is the, wide cloth one shown in the pictureof the bag, It's perfect for me! So I just recommend that if you buy one, make sure to check that front pockets magnets Closure to make sure it works. I truly hate that I can't use that pocket for my key fob and my phone as it would be so much better if I could. Other than that, I do recommend it, its the perfect bag and size for me and it's not heavy, and well made.. The leather is very nice too. The Only reason, I gave it 4 stars, is the front magnet doesn't work which is disappointing. Good luck with the magnet if you get one.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on April 21, 2026
A
Verified Purchase
Amazon Customer
Chelsea, US
★★★★★ 5
Gorgeous leather bag.
Color: Brown
This is a beautiful purse. Better than I expected and higher quality than many expensive, high brand bags I’ve looked at. The leather is awesome, so many pockets, love the pouch. On the front for my phone. Has a secure clasp and the hardware is perfect. I’ve been using the cloth woven handle, looks a little Southwestern. So glad I took a chance and ordered this bag! Do it, you won’t regret it.beautiful leather bag
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 24, 2026
L
Verified Purchase
Lynn N.
Cuba, US
★★★★★ 5
Just what I needed.
Color: Coffee
This bag seems like it is made well. I would highly recommend. It’s not too big or too small for me. Lots of places to put keys, wallet, medicine and a few other things.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 13, 2026
A
Verified Purchase
Amazon Customer
Battle Creek, US
★★★★★ 5
You won’t be disappointed!
Color: Coffee
If you’re looking for a leather crossbody bag; This one is it! Love the look, all the pockets, the size, the choice of straps, the soft leather, the color! So glad I bought it!
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 20, 2026
D
Verified Purchase
DL
Lexington, US
★★★★★ 5
Absolutely soft leather
Color: Coffee
I ordered the coffee color, absolutely love it.Super soft- I have ordered brands that cost 4xs as much & returned because of stiff leather. The zippers simply glide.I love all the different zipper pockets, I like having a place for everything, my phone fits perfectly in the back side zipper area. The front magnetic for my key fob.Zipper above to get out quick cash.I had a hard time deciding which color I wanted! It's roomy enough inside but not too big where Im going to carry things I dont need. It's nice having 2 straps to trade out- im starting with the guitar strap- like that it is adjustable straps & on swivel hooks.And you can really smell the genuine leather. For my preference I would have liked it to have been 2 to 3 inches shorter height wise as I was looking to replace a few bags I used when flying but this is perfect for an everyday crossbody.This bag looks very well made. Nothing fancy on the inside. Plan on searching for this brand in smaller size and some soft colors for spring & summer.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 19, 2026

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