The original two-piece structured snowmobiling boot. With a durable insulated foam inner liner and highly reinforced exterior frame, the ultra-stable Radium GTX Boot provides maximum support for big jump landings and high-impact stresses. with full GORE-TEX® GUARANTEED TO KEEP YOU DRY® waterproof and breathable footwear technology built in, feet remain comfortably dry even in the heat of race-day battle. Radium boot users demand ultimate support, substantial warmth and the convenience of a two-part boot for drying between rides. Features GUARANTEED TO KEEP YOU DRY® GORE-TEX® insulated comfort footwear technology two-part liner/shell design offers maximum stiffness rider specific forward flex with rigid side-to-side support exclusive dual durometer outsole provides superior traction on running boards and the snow encapsulated eva foam mid-sole and stiff board disperses shock and protects feet kicker toe piece resists wear from tunnel bolts and other abrasion rubberized spine and heel aids in support, controls flex, resists abrasion zonal lacing system keeps laces tight while tying hinged tongue makes for easy entry outer boot made with military grade leather replacement laces available removable liner slip pad bottom for easy entry non-slip heel patch keeps liner locked in place exo-lacing system with center pull tightening breathable, insulating foam construction padded toe box comforts and protects toes replacement laces available REMOVABLE LINER slip pad bottom for easy entry non-slip heel patch keeps liner locked in place exo-lacing system with center pull tightening breathable, insulating foam construction padded toe box is comfortable and provides cushioning replacement laces available half sizes can be created with included sole insert