The Dry Tin 5-Pocket Pants are made of our strongest cotton fabric, bringing iconic Filson durability to jobs that dont require protection from extreme weather. Abrasion-resistant dry finish Tin Cloth is the unwaxed version of their famous oil finish Tin Cloth making them just as tough but allowing air exchange during warm weather or high-exertion tasks. Reinforcing rivets at stress points and reinforced rear hems enhance wear-resistance.