78% cotton with FR treatment, 20% polyester fiber and 2% antistatic fiber. Two back pockets with button flap and velcro closure. Two French type pockets. Back elastic at waist. FR zipper. Reflective bands and high visibility. Grammage 290 g/m2. For all types of activity with risk of molten metal projections derived from welding, flame cutting, etc., in places where there is a high risk of fire and/or explosion. EN 13688, EN 11612, EN11611, EN 1149-5, EN 20471 and EN 61482-1-2.