Sea to Summit Reactor Sleeping Bag Liner

The Reactor Fleeceweight adds approximately 14 degrees Fahrenheit of warmth to your sleep system. It uses hollow-core fibers and a grid fleece construction to trap heat, making it a significant upgrade for cold-weather trips.

Not at all. The fabric is a stretch-knit material designed to move with you, and the ergonomic shape ensures you have plenty of room to shift positions without feeling tangled.

Yes, it works perfectly as a standalone sleeping bag in warmer weather. It’s breathable and comfortable enough to use by itself when the temperature doesn't require a full sleeping bag.

The liner features HeiQ Fresh technology, which is highly effective at neutralizing body odors. It helps keep the fabric smelling fresh even after several days of use in the backcountry.

It is very easy to maintain. The liner is fully machine washable, so you can simply toss it in the wash when you get home to clean it and protect your primary sleeping bag from dirt and oils.

It is compatible with most standard sleeping bags. It also includes integrated snap connectors that allow you to secure it directly to compatible Sea to Summit bags, preventing it from twisting around while you sleep.