Duluth Trading Co., Belleville, Wis., offers Souped-Up Sweatpants, made for tradesmen, contractors and others who work outside. The 13-ounce material is 50 percent heavier than normal sweatpants fabric, and it is made of 80 percent cotton and 20 percent polyester to reduce shrinkage. Other features include a built-in fly with sturdy zipper, a web belt built into the waistband, a number of compartments to hold a cell phone, tools, wallet and other valuables, and extra room in the crotch for greater freedom of movement.