---
product_id: 639990533
title: "Sea to Summit Reactor - Insulated Sleeping Bag Liner"
brand: "sea to summit"
price: "R4587"
currency: ZAR
in_stock: true
reviews_count: 6
category: "Sea To Summit"
url: https://www.desertcart.co.za/products/639990533-sea-to-summit-reactor-insulated-sleeping-bag-liner
store_origin: ZA
region: South Africa
---

# Compact & lightweight 0.38kg Up to +25°F warmth boost 50% eco-friendly recycled fabric Sea to Summit Reactor - Insulated Sleeping Bag Liner

**Brand:** sea to summit
**Price:** R4587
**Availability:** ✅ In Stock

## Summary

> 🔥 Sleep warmer, camp smarter—upgrade your adventure game!

## Quick Answers

- **What is this?** Sea to Summit Reactor - Insulated Sleeping Bag Liner by sea to summit
- **How much does it cost?** R4587 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.co.za](https://www.desertcart.co.za/products/639990533-sea-to-summit-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

- • **Snug, Technical Fit:** Mummy shape with drawstring hood ensures a cozy, secure fit that adapts to your sleeping bag.
- • **Easy Care & Packable:** Machine washable with no special detergent needed, stuffs down small in its Ultra-Sil sack for minimalist travel.
- • **Sustainable Performance:** Crafted with 50% Thermolite EcoMade from 100% textile waste—camp green without sacrificing comfort.
- • **Thermal Boost Technology:** Infrared-reflective Thermolite Pro fabric adds up to 25°F warmth—extend your camping season effortlessly.
- • **Versatile Winter Essential:** Perfect for backpacking and winter camping—use as a standalone liner or to upgrade your existing bag’s insulation.

## Overview

The Sea to Summit Reactor Insulated Sleeping Bag Liner uses advanced Thermolite Pro fabric with infrared technology to boost your sleeping bag’s warmth by up to 25°F. Made sustainably with 50% recycled Thermolite EcoMade fibers, it offers a lightweight, compact, and machine-washable solution for year-round camping comfort. Designed in a technical mummy shape with a drawstring hood, it fits snugly inside your sleeping bag or can be used solo in milder conditions, making it a must-have for millennial adventurers seeking eco-conscious, high-performance gear.

## Description

Shop Sea to Summit - Reactor Extreme Sleeping Bag Liner - Regular Mummy With Drawcord - Thermolite For Thermal Boost - Ultra-Sil Stuff Pack - For Backpacking, Camping & Winter Camping - Orange - 364g. Free delivery and returns on all eligible orders.

Review: Well worth the money - Fantastic, far superior to the others I have tried
Review: Klein aber fein - Das Ding ist echt warm. Ob als Zusatz in kalten Gebieten oder als Haupt Schlafsack in passenden Temperaturen. Kann man machen 👍 ich finde vor allem die Öffnung unten auch sehr gut, dann kann man doch auch mal bei Kälte raus und verschwendet nicht gleich die ganze Wärme :D die Größe(ist klein) und das Gewicht ist es mir auch Wert es mitzunehmen. Bei richtiger Kälte ist nicht zu spaßen.

## Features

- THERMAL BOOST: The Reactor Extreme mummy sleeping bag liner, made with Thermolite Pro fabric, uses infrared technology to reflect body heat, enhancing warmth for a 1-season sleeping bag and increasing insulation for a 3-season bag.
- SUSTAINABLE MATERIALS: Constructed with 50% Thermolite EcoMade All-Season fabric, made from 100% textile waste and GRS Certified, and 50% Thermolite Pro, this single sleeping bag liner offers eco-friendly insulation without compromising performance.
- EASY CARE & PORTABLE: The technical mummy shape with a drawstring hood ensures a snug fit. Machine washable with no special soap needed, it packs compactly into its own Ultra-Sil stuff sack. Length: 216cm. Width: Shoulders 80cm, Feet 55cm.
- BEST FOR WINTER CAMPING: Ideal for backpacking and winter camping, this portable sleeping bag liner is perfect for extending the warmth and performance of your sleeping bag in cold conditions or as a stand-alone sleeping bag in warmer weather.
- OUTDOOR GEAR THAT ENABLES FREEDOM: Sea to Summit stands as a testament to the boundless spirit of adventure, blending cutting-edge innovation with a deep commitment to empowering individuals to embrace self-reliance in any environment.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0CT69SWJP |
| Age Range Description | Adult |
| Best Sellers Rank | 62,519 in Sports & Outdoors ( See Top 100 in Sports & Outdoors ) 46 in Sleeping Bag Liners |
| Brand | Sea to Summit |
| Brand Name | Sea to Summit |
| Closure Type | Drawstring |
| Colour | Orange |
| Customer Reviews | 4.4 out of 5 stars 107 Reviews |
| Fabric Type | thermolite |
| Fill Material Type | Thermolite |
| Global Trade Identification Number | 09327868158331 |
| Item Dimensions L x W | 2.16L metres |
| Item Shape | Mummy |
| Item Weight | 0.38 Kilograms |
| Manufacturer | Sea to Summit |
| Manufacturer Part Number | ASL031071-190804 |
| Material | Thermolite |
| Maximum Height Recommendation | 7.08 Feet |
| Model Number | ASL031071-190804 |
| Number of Items | 1 |
| Number of Packs | 1 |
| Occupancy | 1pc |
| Outer Material Type | thermolite |
| Seasons | Multiple Seasons |
| Shape | Mummy |
| Size | Standard |
| Special Features | Thermal Boost |
| Sport Type | Backpacking, Camping, Hiking |
| Temperature Rating | Up to 25F increase in sleeping bag warmth |
| Temperature rating | Up to 25F increase in sleeping bag warmth |
| Unit Count | 1.0 count |

## Product Details

- **Age range (description):** Adult
- **Brand:** Sea to Summit
- **Colour:** Orange
- **Material:** Thermolite
- **Occupancy:** 1pc
- **Seasons:** Multiple Seasons
- **Shape:** Mummy
- **Special feature:** Thermal Boost
- **Sport:** Backpacking, Camping, Hiking
- **Temperature rating:** Up to 25F increase in sleeping bag warmth

## Images

![Sea to Summit Reactor - Insulated Sleeping Bag Liner - Image 1](https://m.media-amazon.com/images/I/51y1ZEIIHRL.jpg)
![Sea to Summit Reactor - Insulated Sleeping Bag Liner - Image 2](https://m.media-amazon.com/images/I/717FGa+RshL.jpg)
![Sea to Summit Reactor - Insulated Sleeping Bag Liner - Image 3](https://m.media-amazon.com/images/I/7142moFOpHL.jpg)
![Sea to Summit Reactor - Insulated Sleeping Bag Liner - Image 4](https://m.media-amazon.com/images/I/81XnJwN4QUL.jpg)
![Sea to Summit Reactor - Insulated Sleeping Bag Liner - Image 5](https://m.media-amazon.com/images/I/818yJJioawL.jpg)

## Available Options

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

## Customer Reviews

### ⭐⭐⭐⭐⭐ Well worth the money
*by M***E on 27 August 2025*

Fantastic, far superior to the others I have tried

### ⭐⭐⭐⭐⭐ Klein aber fein
*by A***N on 28 April 2026*

Das Ding ist echt warm. Ob als Zusatz in kalten Gebieten oder als Haupt Schlafsack in passenden Temperaturen. Kann man machen 👍 ich finde vor allem die Öffnung unten auch sehr gut, dann kann man doch auch mal bei Kälte raus und verschwendet nicht gleich die ganze Wärme :D die Größe(ist klein) und das Gewicht ist es mir auch Wert es mitzunehmen. Bei richtiger Kälte ist nicht zu spaßen.

### ⭐⭐⭐⭐⭐ Buen Producto
*by Y***N on 2 October 2025*

No lo he utilizado todavía pero cumple con la descripción

## 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

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**Shop now:** [https://www.desertcart.co.za/products/639990533-sea-to-summit-reactor-insulated-sleeping-bag-liner](https://www.desertcart.co.za/products/639990533-sea-to-summit-reactor-insulated-sleeping-bag-liner)

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*Product available on Desertcart South Africa*
*Store origin: ZA*
*Last updated: 2026-09-27*