The Chelsea Evolution concept has quickly grown to be a favourite among workers and for a good reason. The 4 way stretch material gives you optimal comfort while the durable fabrics ensure it can handle the toughest jobs out there, Cordura fabric reinforcement on knees, 4-Way Stretch, YKK zipper, Articulated knees, Hanging pockets, Textile, 93% Polyamide, 7% Elastane Chelsea Evolution Construction Trouser