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Sea To Summit Reactor Fleece Sleeping Bag Liner
  • Sea To Summit Reactor Fleece Sleeping Bag Liner
  • Sea To Summit Reactor Fleece Sleeping Bag Liner
Sea To Summit Reactor Fleece Sleeping Bag Liner

This Item Is Field-Tested

Field-Tested goods are high-quality used outdoor gear and apparel that have already proven themselves — packs that have seen the trail, jackets that have weathered wind and rain.

Every Field-Tested item is carefully inspected and certified ready for its next adventure.

This category also includes samples — new items sourced directly from a brand or brand sales representative in new condition. They have original tags that may on occasion state that it is a 'sample' or 'sales sample'.

Sea To Summit Reactor Fleece Sleeping Bag Liner

$37.99 Original MSRP: $89.95
$37.99 Original MSRP: $89.95

Condition: Sample

Field-Tested Condition Guide

Sample
New with original tags.

A 'Sample' is an item that has been procured directly from a brand or brand sales representative in new condition. Item has original tags that may on occasion state that it is a 'sample' or 'sales sample'.

Mint
New with original tags.

Like New
New, but missing tags.

Great
Evidence of use, but no cosmetic issues.

Good
Some light cosmetic issues, but still fully functional.

Flawed Gem
Cosmetic issues or flaws, but still fully functional. An in-demand item or from a highly-desirable brand.
SizeRegular
ColorRed

Pickup currently not available

Sea To Summit Reactor Fleece Sleeping Bag Liner

Regular / Red

FERAL Denver

Pickup currently not available

3936 Tennyson Street
Denver CO 80212
United States

3039038584

FERAL Grand Rapids

Pickup currently not available

1031 Wealthy Street SE
Grand Rapids MI 49506
United States

+16163260091

This item is online only, one-of-one, and GONE when it's gone.

Add Warmth, Extend Your Season — at a Field-Tested Price

The Sea to Summit Reactor Fleece Sleeping Bag Liner is a cold-weather sleep upgrade built for campers and backpackers who want to squeeze more warmth out of their existing sleep system. Constructed from Sea to Summit's soft, insulating Reactor fleece, this liner adds meaningful warmth to any sleeping bag while doubling as a standalone blanket in mild conditions. The Regular length fits most standard sleeping bags with a comfortable, non-restrictive fit. This Red colorway brings a bold, classic camp aesthetic to your kit.

Size: Regular
Color: Red
Condition: Gently Used, Shows Light Signs of Wear
Original Retail: $89.95

Key Features

  • Reactor Fleece Construction: Soft, insulating fleece fabric adds up to +15°F of warmth to your sleeping bag rating
  • Season Extender: Transforms a 3-season bag into a cold-weather system without buying a new bag
  • Standalone Use: Works as a lightweight blanket or camp layer in mild temperatures
  • Regular Fit: Sized to fit most standard mummy and rectangular sleeping bags with room to move
  • Packable Design: Stuff sack included for compact storage in your pack or travel bag

Ideal for backpackers, car campers, and travelers who want to extend the warmth of their sleep system without the cost of a new bag. Buying field-tested gear is a smart, sustainable choice — you get proven performance at a fraction of the cost. A versatile, packable layer that earns its place in any three-season or cold-weather kit.

Gear Up With Confidence

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All Field-Tested items are inspected, fully vetted, and ready for more miles.
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Returns for all online purchases are accepted for 30 days after date of purchase.
Return Policy

Have Questions?

Are the photos of the actual item?

Yes! We photograph every Field-Tested item during our inspection process. We do not use stock photos for used goods or brand samples.
How fast do you ship?

All items ship next business day.
How do I sell my used gear?

Currently, we only purchase used gear in-store at our Denver, CO and Grand Rapids, MI locations.

But if you're in the neighborhood, it's super easy. No consignment — we make you an offer on the spot. Learn more HERE.
Can I try on this item in-store?

Our online assortment of used gear and clothing is unique from our in-store assortment. But, don't worry. We accept returns for 30 days after date of purchase if the item doesn't work out.

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