Reactor Lightweight sleeping bag liner

Temperatures can always drop during a trek or hike. The Sea To Summit Reactor Lightweight sleeping bag liner helps improve the warmth and comfort of your sleeping system while keeping weight and bulk particularly low. It is designed for hikers, travellers and wild campers who want to gain a few degrees of warmth without weighing down their kit.

More warmth with minimal weight

The Reactor Lightweight uses Thermolite® Pro technology, combining hollow fibres and ceramic pigments that absorb and re-emit the infrared radiation naturally produced by the body.

Its main benefits:

• Improves warmth and comfort while sleeping.
• Hollow fibres that trap warm air.
• Infrared technology that helps retain body heat.
• Excellent warmth-to-weight ratio.
• Small packed size for lightweight and ultralight hiking.
• A useful way to extend your sleeping bag's season of use.

Sea To Summit claims an increase in warmth of up to +4°C. As with all sleeping bag liners, this figure is indicative and does not correspond to a standardised measurement like those used for sleeping bags. You should therefore see this extra warmth as improved thermal comfort rather than a guaranteed extension of the bag's temperature range.

For example:

• It can be useful on a wild camping trip that is a little colder than expected.
• It provides a few extra degrees of comfort in spring or autumn.
• It does not replace a sleeping bag designed for significantly colder temperatures.

Excellent freedom of movement

Unlike some more restrictive liners, the Reactor Lightweight is designed to move naturally with you as you sleep.

Particularly useful features include:

• The stretch knit fabric that follows your body's movements.
• The shaped openings for your arms.
• The ability to read or handle equipment without getting completely out of the liner.
• The ergonomic mummy shape.
• The close-fitting hood that improves warmth and comfort.
• Compatibility with all sleeping bag shapes thanks to its stretch fabric.

Press studs at the shoulders also make it easy to connect to certain Sea To Summit sleeping bags for easier entry and exit.

A practical liner for everyday use

The Reactor Lightweight also protects the inside of your sleeping bag from perspiration and dirt, helping to extend its lifespan.

Its practical benefits:

• HeiQ Fresh odour-control technology.
• A lasting fresh feel, even after several nights of use.
• Less frequent washing of your sleeping bag.
• Machine washable.
• Quick drying.
• Compact size that packs easily into a backpack.
• Ideal for lightweight hiking, trekking and travel.

Other features:

• Fabric made from certified recycled Thermolite® Pro fibres.
• bluesign® APPROVED certified materials.

Thermolite Ecodemade: Plastic bottles are collected, cleaned and turned into flakes. They are then converted into chips, spun into fibres and yarn, and finally woven into your liner. This fibre is blended into the Reactor and Reactor Extreme liners.

Thermolite Pro: THERMOLITE® PRO far-infrared fibre technology uses lightweight hollow fibres with special ceramic pigments that generate warmth for your body. Liners made with FIR fibre absorb far-infrared radiation emitted by the body more effectively and return it to the wearer. This heat transfer through re-emission effectively improves body heat retention. This fibre is blended into the Reactor and Reactor Extreme liners.