Patch made with TPR materials (thermoplastic polymer rubber) in place of PVC (polyvinyl chloride) or plastisol, which allows the production of articles in compliance with the environmental protection standards RoHS, REACH, EN 71-3 and ASTM F963. TPR is completely free from phthalates, amines, aromatic hydrocarbons and heavy metals. The diameter is 85 millimetres (3,35 inches). Patch and Velcro were sticked together and then sewed to guarantee the product maximum quality and durability.