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
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
The Rab Sleeping Bag Liner Standard Poly-Cotton is a rectangular sleeping bag liner made of a polyester cotton mix to add an extra of comfort and warmth and to protect your sleeping bag. The rectangular liner is made of comfortable polyester cotton mix an
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
