3/8 inch foam padding covered with rugged endura fabric. Heavy web construction. Swivels have a spring loaded attachment pin that can be secured in a closed position by screwing the threaded cap tight against the swivel body. Swivels have steel sling loops, attachment pins and a cast body.Specifications and Features:Feature 1 - 3/8-inch Foam PaddingFeature 2 - Rugged Endura Fabric ConstructionFeature 3 - Swivels Tested to 300 Pounds