EN ISO 13688:2013. EN ISO 20471:2013 + A1:2016 CLASS 1. Composition: blue 97% cotton, 3% elastane of 260 g/m2 and yellow 61% cotton, 39% polyester of 255 g/m2. High visibility elastic cotton trousers, with two side pockets, two on the front and two on the back. Zip closure.