The Lange RSJ 50 is a junior ski boot with a race inspired design that’s intended for youth racers and all mountain skiers under the age of 8, or those who are slightly small for their age if over 8. Lange is known for their performance oriented ski boots and their racing heritage and their experience and technology trickle all the way down from their World Cup race boots to these junior boots you see here. The boots use a mono-injected shell with Lange’s Control Fit Technology. Control Fit is an ergonomically correct design that helps solve common boot fitting issues. It alleviates pressure points that often occur in ski boots helping to increase comfort as well as blood flow, which in turn results in warmer feet and happier skiers. The 50 flex rating is plenty stiff for even the most aggressive little ones on the mountain, although those who are big for their age and getting close to that age 8 cutoff may want to consider jumping up to a stiffer flexing boots. The three buckle junior specific design retains the performance benefits of a four buckle style ski boot, but allows for a lower cuff profile to accommodate for those shorter legs.