Hi Vis Yellow and Orange conforms to EN ISO 20471 Class 1 and Orange is also GO/RT 3279 Railway use certified. Black and Navy provide enhanced visibility. Made of 280 gsm Anti-pill single jersey knitted soft-feel polyester fabric. Fully elasticated waist with well-made drawcord. Two 5cm width retro reflective tapes bands higher up to the mid thigh. Cargo pocket with velcro flap on both legs. Two Hip pockets with zip closure. One rear patch pocket with velcro flap. Elasticated ankles. Comfortable to wear allowing maximum movement without restriction.