Luxx Curves Waist Trainer is made from three layers of materials, making it thicker and more durable. The breathable material will help you sweat without overheating your core. Three rows of hooks with each row being one inch apart so you can make the most out of your trainer. Material: Core; 96% Nylon, 4% Spandex. Middle layer; 100% Natural Latex. Lining; 96% Cotton, 4% Spandex. Size Small- 26.5-28in.