The Atomic Redster STI 130 is a slightly more flexible race boot Atomic’s sponsored athletes use to compete on the World Cup. The Slim Race Shell offers more flex while retaining stability. The 93mm Narrow Fit last is perfect for low-volume feet, and the World Cup Liner with Memory Fit helps racers achieve the perfect fit to drive their skis as hard as they can. With the same construction, just a little more flex than the Redster STI 150 LIFTED, it’s perfect for slightly lighter skiers to put all their power or weight into turns. No matter what kind of course our World Cup racers are on, this is a boot that helps them race their best.