Rejuvenates your old mattress or makes you new mattress even better; mattress topper refreshes both you and your sleeping environment * Exclusive odor-free sensor-foam memory foam clusters combined with sofloft polyester fiber creates a mattress topper that is plush yet supportive * 2-inch gusseted sidewall and baffle-box quilting is constructed into the topper to prevent the fill from shifting or bunching * Premium Breathable Polyester Shell with Nanotex ?Coolest Comfort Technology keeps you drier and more comfortable as you sleep * Twin extra long size topper measures 39-by-80 inches and 3-inches thick; anchor bands easily secure topper to your mattress; certipur-us certified