Outer material: 60 percent polyester 40 percent polyurethane. Inner material: 50 percent viscose (bamboo - cellulose) 50 percent cotton, 85 percent polyester 15 percent polyuraehane. Sole: 70 percent ethylene vinyl acetate 30 percent Rubber. Closure type: laces. Heel: flat. These trainers feature a combination of polyester and polyurethane for the outer material, with a viscose and cotton blend for the inner lining. The sole is crafted from a durable mix of ethylene vinyl acetate and rubber. Designed with a flat heel and secure lace-up closure.