This classic performance athletic hi-top features Drilex lining a Removable F2A Dual Density Polyurethane Cushion Insert with Shock Eliminator Heel Cushion insole, and a Dual Density; Non Marking Rubber Bottom and EVA Cushion Midsole with Wrap Around Shank Stabilizer; Heel Airbag. Is 100% Non-Metallic. F2A is a Soft molded polyurethane insert that cushions and cradles your foot, provides additional shock absorbing blown polyurethane ball and heel pads and a moisture absorbing fabric covering. These inserts are compatible with ESD and Conductive footwear. Also features a composite toe cap which is made from a non-ferrous elastomeric material. This material is also light weight and will not conduct heat or electricity. Composite toes meet or exceed ASTM F2413-05 Standard for protective footwear.