Posey Company Knitted Heel/Elbow Protector Large, Fits Limb upto 13-1/2" Circumference, Latex-free Comfortable sock-like coverings that provide comfort and help reduce tissue interface pressure. Protectors are madeFrom a latex-free flexible stretch weave yarn with a sorbothane gel pad sewn inside. Sorbothane gel is a highly damped visco-elastic polymer pad that provides pressure reduction and excellent impact absorption properties for the heel and elbow. Latex-free flexible stretch yarn helps minimize friction and shearing on the skin. Non-compression, expandable knit weave helps promote air circulation. Sewn-in contoured soft-open cell foam pad located at the bony prominences of the heel and elbow. Machine washable.