They conform to the child’s body for added safety and have built in UV protection so they won’t heat up or fade in direct sunlight. The swing belt comes with 5 Ft. of 3/16 In. proof coil chain with the bottom 30 In. hot dipped in plastisol for a “pinchfree” grip. These swing belts are a must for any playset. They are a one piece injection molded design rated at 225 lbs.