The Expander liner is made from a premium stretch knit poly-cotton, making it 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. The treatment is approved for use by the EPA (USA) and is used in many hospitals.

• 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 odour-free
• Double folded and reinforced seams
• Easy car, machine washable