---
product_id: 269374484
title: "Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter"
brand: "sea to summit"
price: "¥47080"
currency: JPY
in_stock: true
url: https://www.desertcart.jp/products/269374484-thermolite-reactor-extreme-sleeping-bag-liner-red-90-x-210
store_origin: JP
region: Japan
---

# Boosts warmth by 25°F/15°C Mummy-shape with drawstring hood for snug fit 110g/m² Thermolite fabric for superior insulation Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter

**Brand:** sea to summit
**Price:** ¥47080
**Availability:** ✅ In Stock

## Summary

> 🔥 Sleep warmer, dream bigger with Sea to Summit Thermolite Reactor Extreme!

## Quick Answers

- **What is this?** Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter by sea to summit
- **How much does it cost?** ¥47080 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.jp](https://www.desertcart.jp/products/269374484-thermolite-reactor-extreme-sleeping-bag-liner-red-90-x-210)

## 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

- • **Effortless Care:** Machine washable with no special detergents—ready for your next adventure in minutes.
- • **Warmth Amplified:** Elevate your camping comfort with up to 25°F extra warmth—never compromise on cozy nights.
- • **Ergonomic Mummy Design:** Tailored mummy shape with adjustable hood ensures a perfect, heat-trapping fit for restless sleepers.
- • **Lightweight & Breathable:** Stay warm without bulk—ultra-light 0.88 lbs fabric that breathes, keeping you fresh all night.
- • **Premium Thermolite Fabric:** Experience the plush stretch and superior insulation of 110g/m² Thermolite, outperforming standard liners.

## Overview

The Sea to Summit Thermolite Reactor Extreme Sleeping Bag Liner is a high-performance, mummy-shaped liner crafted from 110g/m² Thermolite fabric that boosts your sleeping bag’s warmth by up to 25°F (15°C). Lightweight and breathable, it features a stretchy knit design with a drawstring hood for a snug fit, perfect for cold-weather camping. Easy to care for and durable, it’s the ultimate upgrade for millennial adventurers seeking cozy, hassle-free outdoor sleep.

## Description

Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter

## Features

- Traps insulating air to increase warmth of a sleeping bag by up to 25°F / 15°C
- Stretchy, Thermolite fabric is incredibly comfortable.
- 110g/m² fabric is warmer than the 80g/m² Thermolite used in the standard Reactor.
- Technical mummy-shape with drawstring hood.
- Easy care – machine wash with no special soap needed. Avoid fabric softeners and dryer sheets.

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Age Range | Adult |
| Color | Red |
| Size | 90 x 120 cm cm |
| Style | Sleeping Bag Liner |
| Material Composition | Outer fabric material: 100% polyester |
| Height | 0.4 inches |
| Length | 83 inches |
| Weight | 0.88 Pounds |
| Shape | Mummy |
| Material Type | Thermolite® |
| Maximum Height Recommendation | 210 Centimeters |
| Number of Items | 1 |
| Outer Material | Nylon |
| Season | Winter |
| Features | Reactor Extreme |
| Usage | hiking |
| Sport | Camping & hiking |
| Batteries Included? | No |
| Brand | Sea to Summit |
| fill material type | Thermolite |
| Department | Unisex |
| Manufacturer | Sea to Summit |
| Item model number | AREACTEX |
| Product Dimensions | 210.82 x 88.9 x 1.02 cm; 399.16 g |
| ASIN | B003BIT004 |

## Product Details

- **Brand:** Sea to Summit
- **Colour:** Red
- **Occupancy:** 1 Person
- **Shape:** Mummy
- **Seasons:** Winter

## Images

![Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter - Image 1](https://m.media-amazon.com/images/I/71lTNobV6sL.jpg)
![Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter - Image 2](https://m.media-amazon.com/images/I/81K1HPK6MeL.jpg)
![Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter - Image 3](https://m.media-amazon.com/images/I/8160Ljdc0TL.jpg)
![Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter - Image 4](https://m.media-amazon.com/images/I/81FUwt0pDZL.jpg)
![Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter - Image 5](https://m.media-amazon.com/images/I/81hJYZcIRaL.jpg)

## Available Options

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

## Frequently Bought Together

- Sea to Summit Thermolite Reactor Extreme Sleeping Bag Liner - Red, 90 x 210 Centimeter
- Squeeze Water Filtration System

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**Shop now:** [https://www.desertcart.jp/products/269374484-thermolite-reactor-extreme-sleeping-bag-liner-red-90-x-210](https://www.desertcart.jp/products/269374484-thermolite-reactor-extreme-sleeping-bag-liner-red-90-x-210)

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*Product available on Desertcart Japan*
*Store origin: JP*
*Last updated: 2026-01-24*