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External ankle brace system
ST Air version features a fully perforated Technomicro material outer for maximum air flow
Sidi’s exclusive cam-lock buckle system for easy entry and boot removal while still offering a perfect glove like fit
Double stitched in all high stress areas
Nylon inner sole with removable arch support pad
All the features of the standard ST, but with the addition of a fully perforated Technomicro material on the outside for maximum air flow. The external bracing system, cam-lock buckles and closable air vents make the ST Air a great upper level warm weather boot.ST Air version features a fully perforated Technomicro material outer for maximum air flow. External ankle brace system. Nylon inner sole with removable arch support pad. Dual compound sole. Sidi’s exclusive cam-lock buckle system for easy entry and boot removal while still offering a perfect glove like fit. Bolt on replaceable and adjustable nylon scuff pads on the toe. Technomicro base material. Double stitched in all high stress areas. Closable air vents on the foot outer. All bolt on parts are replaceable. An elastic panel adjacent to the entry zipper allow a bind free zip and improved fit. Cambrelle lining. Replaceable shin deflector plate. DuPont polymer toe shift pad. Perforated Teflon treated nylon lining. Replaceable, Shock absorbing heel cup. The ST can accommodate riders with up to an 15-inch calf diameter 12.5 inches above from the bottom of their heel. Padded Achilles area.