Sea to Summit Reactor Sleeping Bag Liner – Mummy w/ Drawcord

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The Sea to Summit Reactor Sleeping Bag Liner is a lightweight, mummy-shaped liner that adds warmth and hygiene to your sleep system without adding bulk.

Sea to Summit says: 

With a mummy shape and Thermolite® Pro fabric, the Reactor Liner uses new infrared technology paired with comfortable stretch fabric to offer extra warmth, versatility, and increased insulation. The drawcord offers added flexibility for premium comfort. Best suited to cold conditions.

Our Verdict

The Sea to Summit Reactor Sleeping Bag Liner is a versatile and innovative addition to a sleep system. Designed for cold conditions, this mummy-shaped liner offers a thermal boost to your sleeping bag without adding substantial weight or bulk.

Thermolite® Pro fabric provides an excellent warmth-to-weight ratio. It can increase a 3-season sleeping bag’s temperature rating by up to 6%, making it an excellent choice for extending your gear’s usability into colder seasons.

Weighing just 264g for the standard size, it’s a lightweight solution for those looking to enhance their sleeping comfort. The mummy shape with a drawcord adds flexibility, allowing users to adjust ventilation and warmth as needed.

Sea to Summit has incorporated HeiQ Fresh FFL, an eco-friendly odour control technology, enhancing the liner’s hygiene and longevity. This feature is particularly valuable for extended trips. It’s also much easier to wash a liner than it is to wash a sleeping bag.

– Reviewed by Ultralight Outdoor Gear

Features

• Sea to Summit Liners are treated with HeiQ Fresh FFL, a biocide-free, highly effective odor control technology that uses a bio-based Amino Sugar Polymer to neutralise body odour.
• +6% Thermal Boost to 3-season sleeping bag
• Drawcord on our liners allows you to open or close the footbox allowing you more control of temperature and your comfort.

Specifications

Compact

• Weight: 255g
• Length: 198cm
• Width: 80cm

Standard

• Weight: 264g
• Length: 216cm
• Width: 80cm

Material & Construction

• 50% Thermolite Pro Yarn