Reactor Sleeping Bag Liner

Marsoni

M251S

$91.95

Get it in 3 business days with 1 day shipping. Friday, May 29

Reactor Sleeping Bag LinerSTS SEA TO SUMMIT Reactor Sleeping Bag Liner Enhance your rest with the Sea to Summit Reactor Sleeping Bag Liner, engineered for campers, backpackers, and travelers who demand comfort and warmth in cold or cool conditions. The Reactor Liner uses Thermolite Pro fabric with infrared absorbing ceramic pigments and Thermolite EcoMade fibers, which combine to deliver a superior thermal boost for your sleep system. The advanced stretch knit construction

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Your Reactor Sleeping Bag Liner orders ship within 1-2 business days.

Delivery Options:

Standard: 3-7 business days
Fast: 2-3 business days
Express: 1-2 business days

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Exchange/Return Notes

We offer a 30-day return/exchange service after receiving.
Final sale items are not eligible for returns or exchanges.
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Wanted something that was going to be lightweight but had those longer sleeves because I do still get a tad chilly even on the warmer days. This is perfect, the fabric is lightweight and breathable, the loose cut around the waist adds to the top's "breathability," but it still keeps you cozy and warm on those chilly mornings! The brown is a lovely warm-coffee tone and it hasn't faded a bit in the wash. Very nice shirt to add to your collection!

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Reviewed in the United States on April 14, 2026

Customer Review

West Palm Beach, US

★★★★★ 4

looks nice, well made and styish.

This was a gift for a friend. It is well made, has a good modern style to it, comfortable to wear, she is taller, and it fits her well. Its a bit warm, so a fall kind of clothing option.

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Reviewed in the United States on February 5, 2026

Verified Purchase

Los Angeles, US

★★★★★ 5

Great for layering or wearing on its own!

I’m 5’6” and ordered the small — it fits perfectly! The color is exactly as shown in the pictures, a beautiful beige that goes with everything. The fabric is incredibly soft and comfortable, making it great for layering or wearing on its own. I’m really happy with this purchase and would definitely recommend it!

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Reviewed in the United States on November 1, 2025

Verified Purchase

CC7

Los Angeles, US

★★★★★ 3

Nice but not great

Fits true to size. I ordered a small and it was a great fit. Could be a bit softer. Loved the style. Not too thin or not heavy, nice weight. This quality of the sweater was nice, however the buttons broke apart as I was styling the cardigan. Not happy to have to sew on small buttons to fit the small holes. It’s nice but I had to put too much effort into wearing it.

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Reviewed in the United States on February 11, 2026

Verified Purchase

KINDLE

Lexington, US

★★★★★ 4

Great product

Color: Black, Size: Medium

Love it. Fit is great. The only issue is pilling

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Reviewed in the United States on April 22, 2026