Flex: 1/10 • Pint-sized progression with expandable sizing that goes as they grow. • Get your mini shredder started on the right foot with the Burton Grom Boot. • Oversized Shred Ready Velcro® straps get them out there faster while 3M™ Thinsulate™ Insulation keeps them out there longer. The super cushioned kids’ DynoLite outsole provides better balance, traction, and comfort when hiking, riding, or just playing outside. Better yet, with the Room-To-Grow™ footbed you gain one full size to stay a step ahead of those guaranteed growth spurts.