Why a coil spring mattress? They are perhaps the oldest kind of mattress made today and it has proven itself to be effective and reliable mattress ahead of all other kinds of mattresses by standing the test of time. Your new found comfort and support is only available in brand name sleep systems like these that have set the bar within an extremely competitive mattress industry; Therapedic®, Innergy® 2-sided mattresses, Restonic®, MediCoil HD™ Heavy Duty Mattresses, Corsicana Bedding, Savvy Rest and Sterling Sleep. Systems. Click and see photos below for details and pricing.