Gästematratze Guest Folding Mattress D The mattress is packed to save space. It unfolds relatively quickly after unpacking and has reached its natural shape after 48 hours at the latest. The covers can be washed in the washing machine. However, you can clean them with a damp sponge if necessary. The mattress is tested and certified. It is harmless to health. A slight odor may occur due to the packaging and will disappear after a short time.