98% cotton with FR treatment and 2% antistatic fiber. Two back pockets with button flap and velcro closure. Two French type pockets. Back elastic at waist. FR zipper. Fabric resistant to 50 washing cycles at 60ºC with air drying, maintaining the certified fire retardant properties. Grammage 260 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 and EN 61482-1-2.