The 21" aluminum frame on the Glacier is lightweight, durable and optimizes flotation for kids from 80-150 lbs. * A Rotating Toe Cord system sheds snow as kids walk, reducing the amount of weight they drag. * Easy-to-use and readily adjustable, the patented Quick-Step(rm) binding leverages Tubbs" proprietary Control Wing technology, centering the heel for directional efficiency. * Kid-friendly recreational crampons give kids safe and solid traction on flat and rolling terrain.