If Ronix could make only one boot - this would be it. This is the original heat formed custom orthotic boot that put Ronix on the map - redefining high end signature footwear. The Double Last creates an exact fit from your foot to the shell of the boot for the best in comfort and response. A medium density liner blends mobility and precision board control. Removable J-bars customize your heel pocket while Feetbelts and Silicon ink in the heel area offer the ultimate heel hold. Tool-less mounting hardware. Low friction eyelets. Eco Innovation design means there are no potentially hazardous PVC solvents.