BURTON Kids MDXONE Snowboard Harness - New Gear to protect your child's safety. A simple and effective harness system with a built-in pack. The Burton MDXONE harness is specially designed for learning to snowboard. It includes a kids' backpack and harness system, as well as a retractable leash. It's a comfortable and safe system that allows eager and energetic kid riders to control their own speed and learn to turn and carve.