The Pure-Rest Pegasus Organic Deluxe Innerspring Mattress is constructed with a core Innerspring of electrically tempered steel coils surrounded by organic cotton.  The cotton covered coils are then wrapped in organically processed pure wool from organically raised sheep for natural protection from bacteria, mildew, and mold, and quilted onto a deluxe Pure-Rest organic cotton European outer fabric which ensures the wool will not migrate over the years... Read More...