Atomic Redster STI 70 LCWhile the Redster STI 70 LC is Atomic's most flexible race boot for junior ski racers, the only thing junior about this race boot is the cuff height, specially sized for younger legs. The Slim Race Shell makes it easier to flex than other junior ski boots. Atomic s World Cup liner tech creates a precise interface between boot shell and liner. This is a boot thats ready to perform on the race course. Junior racers will have tons of confidence on race