Boa Fit System Vent from SOLID GEAR is a distinctive highly breathable and lightweight safety shoe. Using the revolutionary ETPU technology, the midsole provides excellent cushioning and comfort. The more energy you put in, the more you get back. TPU reinforcement covering the highly breathable mesh upper guarantees a perfect fit and excellent protection. SOLID GEAR also uses the recently developed NANO protective toecap, which is 40% stronger than fiberglass, lighter than other materials used, and thinner than other metal-free protective toecaps. The use of PU-foam Sock Technology makes the footwear provide the highest comfort in its class. Compliance with the anti-slip SRC class guarantees an excellent coefficient of friction on various surfaces. ESD function in accordance with BS EN 61340-4-3:2002. Upper: Lightweight mesh and CORDURA with TPU reinforcements. Outer sole: Non-slip oil-resistant rubber Midsole 1: ETPU Midsole 2: EVA Insole: Highly breathable, moisture-absorbing and PU foam Function: BOA Fit System Cut: Wide Sizes: 36-48 Safety Standard: EN ISO 20345:25XL S1P, SRC Protection: NANO protective instep and soft metal-free toe contact area