Uvex safety shoe S3 quatro pro, 48. Quality footwear in accordance with EN ISO 20345:2007 S3 SRC, extra wide fit, robust, hydrophobic upper leather, steel toe cap, soft padded collar, padded dust flap, breathable textile lining, dirt-resistant, smooth-running lacing system, removable comfort footbed, antistatic, with moisture transport system for improved climate comfort.uvex 3D hydroflex foam footbed for optimum cushioning in the heel and forefoot area PUR outdoor sole with heel clip, particularly coarse and grippy, self-cleaning tread, 4.5 mm deep, with climbing aid in the joint area foamed overcap to protect the upper leather, steel midsole.