Dunlop DEVON Unisex Safety Wellington Boots in Green. Upper Material: Rubber, Lining Material: Unlined, Sole Material: Rubber. Closure/Fastening: Slip-On. These boots offer a practical and functional design with a steel toe and midsole for protection against sharp objects and toe injuries. Conforming to S5 SRA standards, they feature a PVC/nitrile mix upper and a slip-resistant outsole. The construction includes a 200J steel toe cap and a stainless steel midsole. Additional features include an anti-static and energy-absorbing heel, waterproof properties, and resistance to oil and chemical spills, as well as minerals, vegetable oils and fats, blood, and manure.