The La Sportiva Stratos Cube Alpine Touring Boot
made from an ultra-light, strong, and slightly elastic KarbonKevlar composite that combines durability and stiffness.
When the cuff is free the boot gives you a 76-degree range of motion from a 23-degree rearward to a 53-degree forward lean, about as much ankle and leg flexion as flip-flops. When locked, the lever has 5 separate lean angles from 5-19 degrees, giving you unprecedented control over your stance.
Find out more about this boot here – La Sportiva Stratos Cube Alpine Touring Boot