Here's what other sites are saying:
Add a little extra warmth and softness to your sleeping bag with the Cocoon(R) Microfiber Mummy liner. Lightweight and efficient insulation adds comfort with minimal added weight.
Ensconce yourself in the buttery softness of the Cocoon 100% Microfiber MummyLiner. Not only is it lightweight and fast drying but it also adds up to 5.5 F in warmth to your mummy sleeping bag's temperature rating. Extends the life of your sleeping bag.Use as a sleeping bag liner for mummyshaped bags, or as a standalone sleeping bag in warm climates.Keeps your sleeping bag clean and extends its lifespan.Adds insulation and comfort.100% polyester microfiber is lightweight, fast drying, breathable and has a soft hand.Drawstring hood.Wide top opening.Boxed foot end.Completely double stitched.Size: 95"x35"Weight 8.1 oz.
Cocoon Microfiber TravelSheet
Cocoon Microfleece MummyLiner
Cocoon CoolMax MummyLiner
Cocoon Cotton MummyLiner
Cocoon Flannel MummyLiner
Cocoon Silk MummyLiner
Cocoon Egyptian Cotton MummyLiner
Sea to Summit Reactor Thermolite Liner
$57 - $67