Wherever your travels and overnights take you, wrap yourself in the soft, cozy warmth of Big Agnes' Fleece Liner. Designed to snuggle in on its own or add a thermal boost to your sleeping bag; either way you'll enjoy the luxe feel of the temperature regul
The THERMOLITE® Reactor Fleece liner is Sea to Summit’s warmest sleeping bag liner. Add one to your sleeping bag before heading into really cold environments, or use it as a 'stand alone' sleeping bag when the weather is warmer. The core THERMOLITE® fiber
The THERMOLITE® Reactor™ Extreme liner is Sea to Summit’s warmest knitted sleeping bag liner. If your adventures take you to colder climates, the Reactor Extreme will add plenty of warmth to a sleeping bag. Plus in warmer weather, it can be used as a ‘sta
Wrap yourself head to toe in soft, temperature-regulating merino wool. Merino wool has excellent heating and cooling properties depending on your body's needs for heating or cooling in different environments. Slip it into your sleeping bag to reap the ben
From the random couch-surf session to a humid hostel during a last-minute surf trip to Costa Rica, our cotton liner should always tag along. The 100% cotton fiber is soft against skin and can give you just the added warmth you need to a sleeping bag, or o
