Arm Shapers are great for creating slimmer arms. The comfortable and breathable arm wraps help stimulate the lymphatic system and remove excess water, reducing swelling. Arm Shapers are made from 10% Spandex and 90% Nylon. They are recommended for 4-6 hours of daily use. They can be washed by hand or in the washing machine with a gentle detergent. Dry them naturally by hanging them on a hanger.