As well as protecting your mat and helping to maintain hygiene on camping holidays, the Stretch Sheet SIM provides campers with that extra home-like feeling and comfort when away from home. The sheet has been designed to fit most of our self-inflating mats (65-75 cm wide and all doubles). Improves next-to-skin feeling when using a duvet or an open sleeping bag Openings allow easy operation of valves when cover is on Machine washable High quality fabric extends life span of product_