Helly Hansen Chelsea Evolution Construction black men's work trouser #77441Features Articulated knees for optimal mobility Broad center back belt loop for extra stability and strength Cordura fabric reinforcement on bottom hem Cordura fabric reinforcement on knees Cordura hanging pockets with double lined bottom and nylon webbing for durability Gusset in crotch for freedom of movement ID Card Loop Knee Pad pockets accessible from the inside Knee Pad position can be adjusted by 5 cm for optimal mobility Plastic covered metal