---
product_id: 615451708
title: "Reactor Insulated Sleeping Bag Liner"
brand: "sea to summit"
price: "492 zł"
currency: PLN
in_stock: true
reviews_count: 8
category: "Sea To Summit"
url: https://www.desertcart.pl/products/615451708-reactor-insulated-sleeping-bag-liner
store_origin: PL
region: Poland
---

# Mummy shape with stretch fabric Up to 25°F warmth boost Thermolite Pro hollow-core fibers Reactor Insulated Sleeping Bag Liner

**Brand:** sea to summit
**Price:** 492 zł
**Availability:** ✅ In Stock

## Summary

> 🔥 Sleep warmer, move freer, and stay fresher on every adventure!

## Quick Answers

- **What is this?** Reactor Insulated Sleeping Bag Liner by sea to summit
- **How much does it cost?** 492 zł with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.pl](https://www.desertcart.pl/products/615451708-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, stretchy mummy-shaped liner offers unmatched comfort and fits any sleeping bag shape.
- • **Freshness All Night:** HeiQ Fresh odor control keeps your liner smelling clean even after extended use.
- • **Lifetime Confidence:** Backed by Sea to Summit’s lifetime guarantee for durability and performance you can trust.
- • **Stay Toasty, Anywhere:** Boost your sleeping bag warmth by up to 25°F with advanced Thermolite Pro technology.
- • **Custom Comfort Footbox:** Drawcord footbox lets you adjust ventilation and pairs seamlessly with Sea to Summit’s Free-Flow Zip system.

## Overview

The Sea to Summit Reactor Insulated Sleeping Bag Liner uses cutting-edge Thermolite Pro hollow-core fibers and infrared ceramic pigments to reflect body heat, increasing your sleeping bag’s warmth by up to 25°F. Its stretchy mummy shape ensures a perfect fit and freedom of movement, while HeiQ Fresh technology keeps odors at bay. Featuring an adjustable drawcord footbox compatible with Sea to Summit’s Free-Flow Zip system, this liner is designed for comfort, hygiene, and durability, backed by a lifetime guarantee.

## Description

desertcart.com : Sea to Summit Reactor Sleeping Bag Liner, Extreme 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: It worked for me! - 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

## 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 | B0CT69SWJP |
| Age Range (Description) | Adult |
| Age Range Description | Adult |
| Best Sellers Rank | #18,301 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) #7 in Camping Sleeping Bag Liners |
| Brand | Sea to Summit |
| Brand Name | Sea to Summit |
| Closure Type | Drawstring |
| Color | Spicy Orange |
| Customer Reviews | 4.7 out of 5 stars 255 Reviews |
| Fabric Type | thermolite |
| Fill Material Type | Thermolite |
| Global Trade Identification Number | 09327868158331 |
| Manufacturer | Sea to Summit |
| Manufacturer Part Number | ASL031071-190804 |
| Material | thermolite |
| Maximum Height Recommendation | 7.08 Feet |
| Model Number | ASL031071-190804 |
| Occupancy | 1 |
| Shape | Mummy |
| ShellMaterial | thermolite |
| Size | 85 x 31.5 |
| Temperature Rating | Up to 25F increase in sleeping bag warmth |
| Unit Count | 1.0 Count |

## Product Details

- **Brand:** Sea to Summit
- **Color:** Spicy Orange
- **Occupancy:** 1
- **Shape:** Mummy
- **Seasons:** Winter
- **Temperature Rating:** Up to 25F increase in sleeping bag warmth
- **Age Range (Description):** Adult
- **Sport:** Camping & Hiking
- **Material:** thermolite
- **Fill Material:** Thermolite

## Images

![Reactor Insulated Sleeping Bag Liner - Image 1](https://m.media-amazon.com/images/I/51y1ZEIIHRL.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.

### ⭐⭐⭐⭐⭐ 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

### ⭐⭐⭐⭐⭐ 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.

## Frequently Bought Together

- Sea to Summit Reactor Insulated Sleeping Bag Liner
- Sea to Summit Drylite Towel, Lightweight Camping and Travel Towel
- Rainleaf Microfiber Towel Perfect Travel & Gym & Camping Towel. Quick Dry - Super Absorbent - Ultra Compact - Lightweight. Suitable for Trip, Beach, Shower, Backpacking, Pool

---

## Why Shop on Desertcart?

- 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016
- 🌍 **Shop Globally** — Access 737+ million products across 21 categories
- 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price
- 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members)
- 🔒 **Secure Payments** — Trusted payment options with buyer protection
- ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews

**Shop now:** [https://www.desertcart.pl/products/615451708-reactor-insulated-sleeping-bag-liner](https://www.desertcart.pl/products/615451708-reactor-insulated-sleeping-bag-liner)

---

*Product available on Desertcart Poland*
*Store origin: PL*
*Last updated: 2026-05-06*