The Dirt Lid offers multi sport protection for those urban sessions or your favourite line through the skate park. Metallic painted shell. Custom shaped embossed anti-microbial Drylex liner. Magnetic Fidlock buckle. Camlock ear strap adjusters. Durable shell made from ABS. Complies to standards: CPSC, CE: 1078, AS/NZS 2063. The Krown Action Tri-pack is designed to take abuse from all types of action sports including skateboarding, bmxing, and inline skating. Includes Knee Pads, Elbow Pads, and Wrist Guards. Choose from Adult Extra Small to Large. See below for sizing instructions on the wrist/elbow/knee pads. To ensure a good wrist guard fit, measure hand circumference at the knuckles and match to the sizes listed below: XS 7.0 – 7.5 inches. S 7.5 – 8.0 inches. M 8.0 – 9.0 inches. L 9.0 – 10.0 inches. To ensure a good knee pad fit, measure the circumference of your extended knee and match to the sizes listed below: S 12 – 14 inches. M 13 – 16 inches. L 15 – 18 inches. To ensure a good elbow pad fit, measure the circumference of your elbow with your arm outstretched and match to the sizes listed below:. S 6 – 8 inches. M 8 – 10 inches. L 10 – 12 inches.