Walls Men's Zero-Zone Insulated Bib Overall 100% Cotton Imported Machine Wash Shell constructed of durable 12 ounce 100 percent cotton duck with Walls dry IQ 4 ounce mid-weight insulation with dimaond-quilted lining Elastic inserts at back waist for ease of movement Double knee patches with an additional waterproof barrier for more protection and strength Scuff guards at back leg hems for added durability and snaps for leg length adjustment