This 2 Sided mattress has an 8" 2.2 lb Soy based high densitysoy foam with an ILD of 50 The Natural bamboo fabrics is quilted to 3/8" + 1-1/4 " Soy based convoluted foam and 10 oz DuPont hollofil. The bottom of the mattress is upholstered with a non-skid Grip-top to stop the mattress from sliding. Triple sewed handles for easy rotation. The top of the box spring is also upholstered with the non-skip Grip-top fabric to prevent the mattress from sliding. The standard 8” steel High performance semi flex box spring is available in low profile 5” or High Profile 10” at no extra cost.