Zinus 6 Inch Twin Green Tea Memory Foam Mattress [New Version], Fiberglass Free, Medium Firm Feel, Zoned Pressure Relief, Certified Safe Foams & Fabric, Mattress in A BoxZINUS GREEN TEA MEMORY FOAM Patented zoned pressure relief, medium firm feel, breathable knitted cover, and a durable base foam every layer engineered to contour, support, and move with your body for a better night's sleep. THE BENEFITS OF MEMORY FOAM Contours to your body for personalized comfort, absorbs movement so you sleep undisturbed, and works as a system with a breathable knitted cover and durable base foam for lasting support. PRESSURE RELIEF