Best Reactor Sleeping Bag Liner – Mummy Liners

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Sea to Summit Reactor Sleeping Bag Liners provides extra warmth and versatility in cold conditions. Made from Thermolite® Pro fabric, they increase insulation and comfort. The mummy shape and stretch fabric ensure a snug fit.

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 – Mummy is designed for those seeking extra warmth and versatility in cold conditions. Crafted from Thermolite® Pro fabric, this liner provides increased insulation and comfort. Its mummy shape and stretch fabric ensure a snug fit, while the drawcord adds flexibility for premium comfort.

This liner also features HeiQ Fresh FFL, a biocide-free odour control technology that neutralises body odour, making it ideal for extended trips. Offering a +6% thermal boost to a 3-season sleeping bag, the Reactor Liner is an excellent addition for cold-weather adventurers looking to enhance their sleeping bag’s performance.

– 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

Specifications

• Weight: 264g
• Length: 206cm
• Width: 80cm

Material & Construction

• 50% Thermolite Pro Yarn