The Flexapedic by Sleep Philosophy 3” Tri-Layered Gel Memory Foam Mattress Topper features three unique layers that combine to give you the ultimate sleep environment—the right temperature, comfort and support. The top layer features 1” of 2.5lb “slow recovery” gel infused memory foam. The gel beads add a layer of support within the foam, gathering together at pressure points to deliver maximum support and comfort. The middle layer features 1” of 2.5lb gel infused memory foam in the top and bottom sections of the topper. This helps to alleviate pressure points and acts as ‘shock absorbers’ between you and the base layer. The middle section of this layer features 1” of 2.7lb Latex-like memory foam to give you added support and alignment in your back in mid-section. Last but not least, the bottom layer is 1” high density base foam that’s specially formulated to help prevent motion transfer to allow you to sleep longer without disruption. Memory foam is naturally anti-microbial and resistant to allergens, mold, bacteria and dust mites. The removable (machine washable) zipped cover features breathable ‘air mesh’ side panels and an ‘anti-slip’ bottom to help keep your topper in place on top of your existing mattress. Another feature you’ll appreciate is the topper comes in full mattress sizes to give your bed end to end coverage.