Blue/medium (fits Up To 17 Cir.) Helps Reduce Shear And Friction To Heels And Elbows Flexible Stretch Weave Allows Skin To Breathe Fits Comfortably And Slips On Easily Sewn-in Contoured Foam Pad Eliminates Rolling And Binding Machine Washable; Protectors Retain Shape After Repeated Use Standard Protectors Include A Sewn-in Comfort Pad To Prevent Sores Due To Friction And Shear Heelbo Premium Gel Insert: Viscoelastic Polymer Pad Reduces Pressure By Up To 38%