The Perina Slim Lux features a low profile 8" memory foam mattress with 3" of 3lbs density memory foam plus 2" of "Air Flow" PU foam. The mattress' bottom layer is made of 3" 2lbs high density PU foam. It is wrapped in 80% cotton, 20% polyester velour removable cover with zipper for easy cleaning. King size extra $100. Available in all three sizes. It comes in a compressed roll with box packaging for easy and care-free shipping.