Color: Lunar Rock Sizes: 37 to 47 shoe S1P low in suede calf, toe cap 200J aluminum. Air Mesh lining and removable perforated EVA footbed with shock absorber insert. anti-perforation insert K SUN passage by zero. heel TPU protection. Sole: EVA midsole with protective TPU film. Nitrile rubber HRO. Regulations: S1P-HRO-SRA.