Lightness:REMARKABLY LIGHTWEIGHT - approximate weight for size 42: 330 grams Comfort:EVA (Ethylene-Vinyl Acetate) FOAM underfoot cover with cushioning heel pad Design:• Highly breathable mesh fabric with TPU (Thermoplastic Polyurethane) inserts • Heel stability support • Stretch slip-on collar Durability:Sole: • EVA (Ethylene-Vinyl Acetate) mid-sole • Durable nitrile rubber tread Safety:• Without toe cap • Without penetration-proof insole Weight:330 (g) EU: 39-48 UK: 6-13