The leather used in NOBULL Lifters is hand selected, top grain material, embedded with natural oils. The result is exceptionally strong and durable leather, with rich texture. As a result, these women's weight lifting trainers are durable, strong, and have a rich texture. The heel is made of layers of stacked leather that are individually cut, bonded, waxed, finished, and buffed to give you the smoothest heel. Each contoured heel and outsole receives two to three hours of handwork to allow the natural grain to shine. These lifters have a removable and molded sockliner and a functional strap to provide a secure fit.