The THERMOLITE REACTOR is a surprisingly thermally efficient sack sheet. This model is much more than a simple sheet, as itincreases the temperature of a sleeping bag by 8C.
A much more compactalternative to a fleece bag, this sheet is ideal for adventurers who sleep in cold temperatures. Thanks to Thermolite Reactor technology, a fabric made from the thinnest Thermolite fibers, this sheet provides incomparable thermal comfort.
Ergonomically shaped to retain maximum leg warmth, this sheet can even be used as an outer bag on warm nights. It is machine washable and compacts into its own Ultra Sil bag.