A Swedish-made mattress offering high comfort and good air circulation. The padding consists of compressed OEKO-TEX certified fiberfill, and the removable outer fabric is made from 100% cotton satin. If you want to NG Baby's thick crib bumper without ties, choose the 55x115 cm mattress size. This will allow the bumper to fit between the cribs bars and the mattress. Don't forget to occasionally flip and rotate your childs mattress. This ensures more even wear and prolongs the mattress's lifespan.