Bodipedic 4" Hybrid Memory Foam and Fiber Mattress Topper Experience soft fiber and supportive memory foam in one product with this 4-Inch Hybrid Mattress Topper from Bodipedic. The luxury baffle box fabric cover features a layer of plush gel fiber and a stretch-to-fit bed skirt that fits mattresses up to 18-inches deep. Also included with this hybrid topper is a 2-inch ventilated AeroFusion memory foam slab to offer additional support for ultimate comfort. The hybrid design allows you to use both layers together for multiple layers of comfort, or only the memory foam slab for firmer support, or use only the fiber filled cover for softer support. The odor free memory foam meets CertiPUR-US standards for content, emissions, and durability. Each hybrid mattress topper is backed by a 5-year limited warranty.