The Expander Liner series are the obvious choice for the price conscious traveller. They are made from a premium stretch-knit poly-cotton material which is super stretchy and even warmer than a standard cotton weave liner. The stretch properties allow the Expander to move with you as you sleep, vastly increasing comfort and minimising tangles. The anti-microbial treatment keeps bacteria at bay as well as prolonging the life of your liner and sleeping bag. The anti-microbial treatment won’t wash out of the liner, and does not use nano-sized particles.   FEATURES: Premium stretch knit fabric that can expand twice its width. Luxuriously comfortable to sleep in. Extends the life of a sleeping bag by keeping it clean Anti-microbial protection keeps liner fresh, hygienic and odor-free Double folded and reinforced seams Easy car, machine washable