1-inche of visco foam provide a firm sleeping surface that helps alleviate aching muscles and stiff backs while the odor-neutralized foam keeps your sleep area fresh day after day. This cozy foam mattress topper has seven zones specifically created to relieve pressure points created by your mattress so you can wake up feeling refreshed. This Foam Mattress Topper makes your stiff bed more comfortable Dont be alarmed when it comes folded up so compact. Within 2 hours of unpacking it, the topper becomes full size!