The Chelsea Evolution BRZ has a breathable, abrasion resistant polyester mesh upper and a non-marking slip and abrasion resistant EXTRALIGHT outsole for all day comfort and protection. No Protective Midsole Standard Fit Not Water-Resistant Sole Has No Anti-Static Properties Breathable, Abrasion Resistant Polyester Mesh upper with TPU welded overlays Molded TPU toe bumper Molded heel overlay Moisture wicking & breathable air mesh lining Aluminum safety toe Metal free nail penetration protection - Manufacturers part number: 988YG