Flex Booster 3K

A Flex Booster is a great addition to your snowboard boots that enables enhanced performance, stiffer flex and more support where it’s needed most.

Especially stiff, the 3K makes a boot incredibly supportive and exceptionally responsive by increasing its flex rating by three points. Skip the gym and ditch the weights—the Flex Booster 3K is all you need to max out your ride.