Yoko Hi Vis Waterproof Overtrousers - 3 Colours / 32-54" Waist S, M, L, XL, 2XL, 3XL (32/34", 36/38", 40/42", 44/46", 48/50", 52/54") Hi-vis yellow conforms to EN ISO20471:2013 Class 1 & EN343 against foul weather. lack and Navy provide enhanced visibility (non-EN471 standard). 100% waterproof Polyester with Oxford PU coating. Two 5cm wide reflective bands around lower legs.