While the Atomic Redster STR 2 LC is for lighter or junior racers, the only thing junior about this boot is the cuff height, which sits just a bit lower for shorter legs. Everything else is on par with Atomic’s top-of-the-line World Cup boots. Atomic’s World Cup Gold Low liner is made from soft internal foam that delivers a cushioned fit, as well as cuff lacing to improve responsiveness and skiing precision. A slim-fitting 91mm Narrow Racing Last and sizing that goes down to Mondo Point 21 means smaller and lower volume feet can get a locked-in, ready-to-rip feel. Thin yet powerful STR Wall Thickness and 90 flex rating allows petite athletes to flex the boot without sacrificing power and control. Depending on foot shape and compression tolerance, junior racers who like this boot may also want to consider the Redster TX LC, which comes in several flex options. Redster Solid Sole interfaces smoothly with alpine race bindings.Norm : [Alpine ISO 5355]Weight (g) / Boot (Size) : 1,850 / 24-24.591mm Racing Last: Narrow / LV18° Power Shift Race ShimMicrofiber OuterRedster Fixed TongueCuff Lacing3D Stretch Toe BoxMemory FitTrue Size Mondopoint 21Size AdjusterMagnesium Elite BucklesDual-Sided Cuff Alignment0°16° (Default)Depth Guide Boot Board18°1° Sole CantingSTR Wall ThicknessRedster Solid SolePU Shell / PU CuffLow Cuff - All SizesWorld Cup Gold Low LinerShim System35mm Velcro Strap91mm Racing Last: Narrow / LV18° Power Shift Race ShimMicrofiber OuterRedster Fixed TongueCuff Lacing3D Stretch Toe BoxSize Adjuster2nd Power Control ScrewMagnesium Elite Buckles0°16° (Default)Depth Guide Boot Board18°1° Sole CantingSTR Wall ThicknessRedster Solid SoleLow Cuff - All Sizes35mm Velcro StrapDual ControlMemory FitPU Shell / PU CuffDual-Sided Cuff AlignmentWorld Cup Gold Low LinerTrue Size Mondopoint 21