Sea To Summit

Reactor Thermolite Sleeping Bag Liner

Greatly helped us isolate against

[This review was collected as part of a promotion.] Greatly helped us isolate against cold temperatures going down to 24F while tent camping.

The best bag liner from a great outdoor retailer

[This review was collected as part of a promotion.] I appreciate the customer service-always delivered promptly and great communication. The product is just what I was looking for-a small light weight sleeping bag liner which keeps my expensive sleeping bag clean and adds a little warmth but doesn’t restrict movement.

Reactor liner

[This review was collected as part of a promotion.] Love this liner for my 30 degree down quilt! Warm, and so comfortable. I know it will keep my quilt cleaner, and will easy to wash. Will use it on my At thru hike in 2024.

Sleeping bag protection

[This review was collected as part of a promotion.] Comfortable sleeping bag protection plus add warmth. After a grimy day of hiking or biking and not being able to shower the sleeping bag liner is not only comfortable but keeps my expensive sleeping bags clean and in good shape. Easy to eat a liner after each trip and because of it I've never needed to wash a sleeping bag

Reactor

[This review was collected as part of a promotion.] Adds real felt warmth to lighter bags when temps dip slightly less than bag rating.

Excelente para el verano

[This review was collected as part of a promotion.] Excelente para el verano, y seguro se sumará a mis acampadas en climas más frescos. Suave y comfortable. Primera calidad, como todo lo que ofrece Sea to Summit

I actually have not used

[This review was collected as part of a promotion.] I actually have not used it yet,weather is jus starting to warm up for camping here in Alaska!

Worth the money

[This review was collected as part of a promotion.] It does make a difference, I wish I would have gotten the step above this one. Very light and easy to use, easily fits inside almost anywhere you need to stuff it.

Add this nice little lightweight addition to your kit

[This review was collected as part of a promotion.] This little guy is an awesome way to "Pack Light, Freeze at night, but at least you'll make the hike" for all you infantrymen out there. This will take a crap issued sleeping bag and make it comparable when supply says their out of cold weather gear or make an ultralight sleeping bag into a normal Weighted bag without dropping hundreds more on repetitive gear. Great addition to any camping loadout.

100% worth the extra weight/space

Familiarity:

I've put it through the wringer

Height:

6' 1"

Weight:

190

Bought this to supplement my 39F-rated REI Magma bag on a recent backpacking trip to Alaska and I'm glad I did. Temps dipped into the low 30's F and it rained a lot overnight resulting in a humid, wet tent interior. Not only did the liner add significant warmth to my bag, but it adds a really cozy feeling. I was able to sleep in just a thin base layer without the need for a hat or super thick socks. It's a little bit awkward to get in and out of (especially in the middle of the night should you need to jettison some fluids), but well worth it. I can see this adding enough warmth to take my 39F bag down to the mid 20's without issue.