Sleeping Bag Liners

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 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 THERMOLITE Reactor Fleece sleeping bag liner is a luxuriously soft and super warm liner that can bump up the warmth of your sleeping bag consid...

The Toaster Fleece can be used on its own or as a liner and is ideal for hut trips in warm weather. The full-length side zipper makes entry and ex...

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 luxurious feel of premium AA Grade silk, made even more comfortable by stretch panels running along the main seams; all in a super lightweight,...

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, ...

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 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 remedy to those super cold nights might be this synthetic liner. Able to add a potential 10-15 degrees of warmth to your bag it attaches to loo...