---
product_id: 619554808
title: "Reactor Insulated Sleeping Bag Liner"
brand: "sea to summit"
price: "$181.78"
currency: USD
in_stock: true
reviews_count: 13
category: "Sea To Summit"
url: https://www.desertcart.ec/products/619554808-reactor-insulated-sleeping-bag-liner
store_origin: EC
region: Ecuador
---

# HeiQ Fresh odor control Thermolite Pro heat retention Drawcord footbox adjustable comfort Reactor Insulated Sleeping Bag Liner

**Brand:** sea to summit
**Price:** $181.78
**Availability:** ✅ In Stock

## Summary

> 🔥 Sleep warmer, move freer, and stay fresher—your ultimate camping upgrade!

## Quick Answers

- **What is this?** Reactor Insulated Sleeping Bag Liner by sea to summit
- **How much does it cost?** $181.78 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ec](https://www.desertcart.ec/products/619554808-reactor-insulated-sleeping-bag-liner)

## Best For

- sea to summit enthusiasts

## Why This Product

- Trusted sea to summit brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Freedom to Move:** Knitted stretch fabric moves with you, eliminating that trapped, stiff feeling.
- • **Next-Level Warmth:** Thermolite Pro fibers reflect your body heat for cozy nights even in chilly temps.
- • **Custom Comfort Fit:** Drawcord footbox lets you dial in perfect snugness or ventilation on demand.
- • **Lifetime Confidence:** Backed by Sea to Summit’s lifetime guarantee—gear up with zero compromise.
- • **Stay Fresh, Stay Ready:** HeiQ Fresh tech keeps odors at bay, so your liner feels clean trip after trip.

## Overview

The Sea to Summit Reactor Insulated Sleeping Bag Liner uses advanced Thermolite Pro technology with hollow-core fibers and infrared ceramic pigments to reflect body heat, enhancing warmth without bulk. Featuring an adjustable drawcord footbox for personalized comfort and HeiQ Fresh odor control for lasting freshness, this stretchy mummy-shaped liner fits seamlessly with most sleeping bags. Lightweight and durable, it’s designed for 3-season use and backed by a lifetime guarantee, making it a must-have for millennial adventurers seeking warmth, hygiene, and freedom on the trail.

## Description

desertcart.com : Sea to Summit Reactor Sleeping Bag Liner, Regular Standard (85 x 31.5) : Sports & Outdoors

Review: Warm and comfortable. - Kept me pretty warm with my 32F down sleeping bag in 25F weather. My feet got a little cold but wasn’t bad enough to keep me up all night.
Review: Great liner for summer months - i’m not keeping this because I need something a little warmer. I’m getting ready to start the Appalachian Trail and I just don’t think this is warm enough for me looking for a warmer insulated liner for my sleeping bag. If I wouldn’t be hiking in the cold, I probably would’ve kept it.

## Features

- thermolite
- Imported
- Insulated sleeping bag liner adds extra warmth and personal hygiene to any sleeping bag.
- Thermolite Pro technology using knitted, hollow-core fibers and absorbing infrared ceramic pigments to reflect your body's heat back to the wearer for enhanced warmth and comfort
- Drawcord footbox can be opened or closed for optimal comfort and integrates perfectly with the footbox of our Free-Flow Zip system in select Sea to Summit sleeping bags
- HeiQ Fresh odor control technology helps keep the liner fresh even after extended use
- Knitted fabric provides incredible stretch and freedom of movement in this mummy-shaped liner and works seamlessly with sleeping bags of any shape, Sea to Summit Guarantee is offered for the Lifetime of this product

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CT6B4WGH |
| Age Range (Description) | Adult |
| Best Sellers Rank | #11,533 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #5 in Camping Sleeping Bag Liners |
| Brand | Sea to Summit |
| Brand Name | Sea to Summit |
| Closure Type | Drawstring |
| Color | Sulphur Yellow |
| Country of Origin | China |
| Customer Reviews | 4.7 4.7 out of 5 stars (247) |
| Date First Available | January 24, 2024 |
| Fabric Type | thermolite |
| Fill Material | Thermolite |
| Fill Material Type | Thermolite |
| Global Trade Identification Number | 09327868158430 |
| Item Dimensions LxWxH | 78 x 31 x 1 inches |
| Item Package Dimensions L x W x H | 7.52 x 4.69 x 3.78 inches |
| Item Weight | 0.67 Pounds |
| Manufacturer | Sea to Summit |
| Material | thermolite |
| Maximum Height Recommendation | 7 Feet |
| Occupancy | 1 |
| Outer Material | thermolite |
| Package Weight | 0.31 Kilograms |
| Part Number | ASL031061-190906 |
| Seasons | 3 Seasons |
| Shape | Mummy |
| Size | Regular Standard (85 x 31.5) |
| Style | Regular Standard (85 X 31.5) |
| Suggested Users | unisex |
| Temperature Rating | 31 to 45 degrees Celsius |
| Thermal Resistance | 7.78 Watts per Meter per Degree Celsius |

## Product Details

- **Age Range (Description):** Adult
- **Brand:** Sea to Summit
- **Closure Type:** Drawstring
- **Color:** Sulphur Yellow
- **Fill Material:** Thermolite
- **Material:** thermolite
- **Occupancy:** 1
- **Seasons:** 3 Seasons
- **Shape:** Mummy
- **Temperature Rating:** 31 to 45 degrees Celsius

## Images

![Reactor Insulated Sleeping Bag Liner - Image 1](https://m.media-amazon.com/images/I/51DzChWfCDL.jpg)

## Available Options

This product comes in different **Style** options.

## Customer Reviews

### ⭐⭐⭐⭐⭐ Warm and comfortable.
*by J***K on February 10, 2026*

Kept me pretty warm with my 32F down sleeping bag in 25F weather. My feet got a little cold but wasn’t bad enough to keep me up all night.

### ⭐⭐⭐⭐⭐ Great liner for summer months
*by C***R on January 7, 2026*

i’m not keeping this because I need something a little warmer. I’m getting ready to start the Appalachian Trail and I just don’t think this is warm enough for me looking for a warmer insulated liner for my sleeping bag. If I wouldn’t be hiking in the cold, I probably would’ve kept it.

### ⭐⭐⭐⭐⭐ It worked for me!
*by W***N on January 29, 2026*

First night was in the 20’s f and worked great with my sleep system. I woke up to a small amount of snow and was warm without feeling drafts in my hammock. I use this every time in my sleep system

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**Shop now:** [https://www.desertcart.ec/products/619554808-reactor-insulated-sleeping-bag-liner](https://www.desertcart.ec/products/619554808-reactor-insulated-sleeping-bag-liner)

---

*Product available on Desertcart Ecuador*
*Store origin: EC*
*Last updated: 2026-03-05*