Sleeping Bags & Liners

A lightweight silk blend sleeping bag liner featuring a soft Thermolite-silk fabric Designed primarily for comfort, the Silk Blend Liner adds warmt...

A lightweight silk blend sleeping bag liner featuring a soft Thermolite-silk fabric Designed primarily for comfort, the Silk Blend Liner adds warmt...

Add warmth to your sleep system in cool or cold conditions: with our Reactor Liner. Using Thermolite® Pro fabric with infra red-absorbing ceramic p...

Coolmax fabric technology keeps you dry and comfortable by wicking moisture from the skin TENCEL Lyocell is a USDA-certified fiber, manufactured u...

The Traveller Sleeping Bag is great for a summer yurt trip, El Camino pilgrimage, bike tour, or as a lightweight summer backpacking sleeping bag. I...

A full-length zipper, shoulder and footbox drawcords and an incredibly small packed size give the Traveller unmatched versatility you are looking f...

The THERMOLITE Reactor liner is Sea to Summit's top seller in the sleeping bag liner range. It's an excellent cold weather option for those who nee...

The THERMOLITE Reactor Compact sleeping bag liner is the ideal choice for gram counters under 6 feet who want to add warmth to their sleep system. ...

The Expander sleeping bag liner is a super soft and stretchy poly-cotton making it wonderfully stretchy and warm. It's an ideal choice for travel, ...

Innovative infrared technology provides exceptional warmth in colder-weather An essential component in your sleep system, the Reactor Extreme lin...

Mummy version liner with a drawcord base,  the stretch-knit fabric offers incredible freedom of movement. In humid conditions, the blend of 70% Coo...

Mummy version - compact with a drawcord base,  the stretch-knit fabric offers incredible freedom of movement. In humid conditions, the blend of 70%...

Keep your sleeping bag fresher, warmer, and longer-lasting with the Sea to Summit Expander Travel Sleeping Bag Liner. The premium stretch knit poly...