To improve your shopping experience today and in the future, this site uses cookies.
I Accept Cookies
Meet the Sea to Summit Reactor Extreme Liner. It is crafted with a mummy shape, Thermolite Pro fabric and utilises infrared technology, making it perfect for cold conditions where extra heat retention is essential.

Meet the Sea to Summit Reactor Extreme Liner. It is crafted with a mummy shape, Thermolite Pro fabric and utilises infrared technology, making it perfect for cold conditions where extra heat retention is essential.

Sea to Summit

Sea To Summit Reactor Extreme Sleeping Bag Liner Mummy with Drawcord

£70.00
Earn
in Customer Rewards when you buy this item today
Pre-Order

With Pre-Order, you can purchase the latest items added to our store in advance of them arriving with us.

Your Pre-Order is prioritised (at no additional charge); meaning that as soon as the product arrives with us, we can wrap it straight back up; ready for collection via Click & Collect or despatch to you — it often never even hits the stock room shelves!

Pre-Launch

With Pre-Launch, the date when we expect to receive the product ourselves is still a little too hazy to be confident in accepting Pre-Orders.

So, instead, you can submit your email address against the item you are interested in and we will email you as soon as stock arrives on the system.

Estimated Delivery & Collection Dates

Estimated Delivery & Collection Dates are given on Pre-Order and Pre-Launch products. They are for indication purposes only and can change at any time without notice.

The dates we provide are based on indications given by our suppliers. Whenever we get updated information from our suppliers we will endeavour to update the Estimated Delivery & Collection Dates provided on product pages.

We estimate this will be ready for despatch to you or collection via Click & Collect on Undetermined
Earn Rewards
When you purchase this item, you will earn of rewards points to spend on your next purchase from us. You can spend your Rewards balance in-store & online.

90-day returns period

We hope that you are perfectly happy with your order from Trekitt, but we understand that you may want to return your purchase. We offer a 90 days return period from the date of purchase, and endeavour to process all returns within 48 hours of receipt.

We do not offer a free returns service. Therefore, all customers are responsible for any postage costs when returning any goods (excluding warranty returns).

For your convenience, follow here to the Royal Mail Returns Portal to arrange return postage for your items. This is not a Trekitt operated service.

The Trekitt Returns Policy Includes...
A 90 day return period and the Trekitt 2-year Common Sense Guarantee.

Exemptions
PPE (Facemasks, Climbing Equipment etc. ), Food Goods, Accessory Cord, Socks & Underwear can only be returned if they have not been worn and/or removed from their original packaging with all swing tags still attached. If there is any sign or possibility that the goods have been used, tampered with or contaminated in any way, then we cannot accept a return on the grounds of consumer safety. Zips are typically not covered under a manufacturer's warranty.

The above does not affect the Consumer Contract Regulations. Click here to read more.

Sea To Summit Reactor Extreme Sleeping Bag Liner Mummy with Drawcord

Season:2024W R

Brand:Sea to Summit

Code:ASL031071-190802

What is the Sea to Summit Reactor Extreme Compact Liner?

The Reactor Extreme is a high-performance liner designed to boost the thermal efficiency of your sleeping bag. The liner's mummy shape and adjustable drawcord footbox make it versatile for various sleeping preferences, ensuring a snug and tailored fit for every sleeper.

What is it made of?

The Sea to Summit Reactor Extreme Liner is made from 50% recycled yarns. The innovative blend includes two types of yarns: Yarn 1 consists of 50% Thermolite Pro Yarn, known for its superior thermal properties and durability. Yarn 2 comprises 50% Thermolite EcoMade yarn, made entirely from recycled resources, further minimising waste and promoting a circular economy. This combination of materials ensures that the reactor liner provides exceptional warmth and comfort, making it an ideal choice for responsible adventurers.

This reactor liner also features Thermolite Far Infrared technology with hollow fibres, similar to standard Thermolite, but with the addition of permanent ceramic pigments. These pigments absorb the body's infrared rays and reflect them back to the wearer, enhancing warmth and comfort during cold-weather camping.

The fabric is also treated with HeiQ Fresh FFL, a biocide-free odour control technology that uses a bio-based amino sugar polymer to neutralise body odour. This means the liner remains fresh and odour-free, providing you with a clean and comfortable sleeping environment.

What are its features?

The Sea to Summit Reactor Extreme Liner is designed to optimise your comfort during outdoor adventures. Its mummy shape is crafted to contour to your body, ensuring maximum warmth while minimising weight, making it an ideal companion for chilly nights under the stars.
The drawcord adds extra versatility, allowing you to adjust the footbox to your liking. Whether you prefer more airflow on warmer nights or snug warmth on colder ones, the drawcord lets you fine-tune your sleeping environment for optimal comfort.
Additionally, the liner undergoes rigorous testing in accordance with ASTM D1518-2014 standards. These tests ensure that the liner provides reliable thermal performance, with results indicating a thermal boost of +7% for 3-season use and +15% for 1-season use, which means the reactor liner delivers enhanced warmth during cold conditions, keeping you cosy and comfortable throughout your outdoor escapades.

Features:

  • Thermolite Far Infrared technology
  • Mummy shape
  • Thermal Boost: +7% for 3-season, +15% for 1-season sleeping bag
  • Adjustable drawcord footbox
  • Bio-based odour control
Technical Information

Fabric Composition: 50% recycled yarns
Yarn 1: 50% Thermolite Pro Yarn.
Yarn 2: 50% Thermolite EcoMade yarn, made with 100% recycled resources
Fabric Technology: Thermolite Far Infrared
Fabric treatment: Heiq Fresh bio-base odour control
Thermal Boost: Up to +6% for 3-season bags, +12% for 1-season bags
Length: 198cm
Width: 80cm
Weight: 353g

Sizing Information
Professional Opinion
Product Reviews
Home Camping Equipment Sea to Summit Sleeping Bag Accessories