Sleeping Bag Liners

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 Adaptor COOLMAX sleeping bag liner is an excellent versatile choice that adapts to varied temperatures and humidity. It's ideal for use on its ...

The THERMOLITE Reactor Extreme is the warmest backpacking knit sleeping bag liner Sea to Summit offers. The hollow fiber yarns work just like the h...

The Adaptor COOLMAX sleeping bag liner is an excellent versatile choice that adapts to varied temperatures and humidity. It's ideal for use on its ...