These Tech X boots offer one-of-a-kind comfort and style Leather upper 85% recycled foam Blend85 footbed CellStretch Comfort Technology responds by activating more than 100 individual pressure points of cloud-like comfort in the heel and ball of the foot Nylon/glass fiber shank Approximately 1 1/2 inch walking heel Air mesh lining Rubber leather-look outsole Integrated spur shelf Double stitched welt Taped interior seams Twisted X Men's 11 Inch Tech X Boot Coffee