The spring is a 312 Bonnel coil with 6 turns for a 7” high profile using a 13 gauge wire. The 6 ½” gauge border wire and, 24 double edge guard all around the edge of the spring give extra end and side support. A full 8 oz insulator pad used throughout the entire mattress, then a 3/4" high density soy based foam topper. The Natural Cotton fabric is quilted to 3/4" foam.The bottom of the mattress is upholstered with a non-skid Grip-top to stop the mattress from sliding. The top of the boxspring 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.