Antimicrobial protection All of the Expander Liner series have been impregnated with an antimicrobial treatment which won’t wash out of the liner, and which does not use nano sized particles. This treatment restricts the growth of bacteria and other microbial life which can cause fabrics to smell. Because of this treatment, our Expander Liners are going to stay smelling fresher and will be more hygenic than our standard cotton liners, particularly on longer field trips. Seamless Construction The knitted construction of the Expander Fabric means that they are manufactured without a side seam, eliminating a potential source of irritation and a wear point. Product 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 odour-free Easy care, machine washable