The Redster STI 130 is a slightly more flexible race boot that Atomic’s sponsored athletes use to compete on the World Cup. The Slim Race Shell offers more flex than the STI 150 while retaining complete control. The 93mm Narrow Fit last is perfect for low-volume feet, and the Mimic World Cup liner creates a responsive connection to the boot so racers can drive their skis as hard as possible. The V3 Tongue System allows you to select the tongue volume that best fits your body, for a dialed interface between your shin and the boot. There is just a little more flex than the Redster STI 150 LIFTED, but with the same construction - ideal for slightly lighter skiers putting all their power into the turns. No matter what kind of course Atomic's World Cup racers are on, the Redster STI 130 helps them race their best.