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...

The Anvil Horn 30° offers a roomy, rectangle-shaped sleeping space with Downtek™ PFC-Free insulation and an integrated Flex Pad Sleeve on the botto...

An ideal liner for any travel adventure around the globe. If you're not sure about your hostel sheets, the Silk-Cotton Blend Sleeping Bag liner is ...

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, ...

Packing the Saros ensures that cold and wet conditions don't dampen your sense of adventure.

We've loaded this winter bag with the performance-enhancing features Therm-a-Rest bags are known for, from SynergyLink Connectors to ThermaCapture ...

Our Women's Anthracite 20° traditional mummy-style sleeping bag is designed to be taken anywhere and provide rest after a long day outside. Stay co...

Our Anthracite 20° traditional mummy-style sleeping bag is designed to be taken anywhere and provide rest after a long day outside. Stay cozy with ...

Our Anthracite 20° traditional mummy-style sleeping bag is designed to be taken anywhere and provide rest after a long day outside. Stay cozy with ...

If the forecast looks damp and your camp needs to be comfy, the Saros 32F/0C is the lightest bag in our Saros line of top-rated synthetic sleeping ...

An insulated adventure poncho doubles as a stylish and cozy blanket. Fun or technical? You decide. The Honcho Poncho offers extra warmth and water...

Constructed of premium materials, the Honcho Poncho Down delivers high-performance protection and sublime comfort making it the ideal layer to wear...

Our most sustainable sleeping bag with un-dyed, recycled materials We set out to prove that sustainability is about opportunity, not sacrifice. B...

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

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...

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

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...

With a stretchy poly-cotton fabric material, this liner has a very comfortable feel to promote a good night's sleep when camping. There is an antim...

The Sea to Summit Reactor Thermolite Liner is an excellent cold-weather option for those who need additional warmth. The Sea to Summit Reactor Ther...