The patented and trademarked Vertebra System protects the riders Achilles tendon. Replaceable thermoplastic resin ankle ball protection cup. Bolt on (no Velcro!) replaceable, adjustable and aerodynamic nylon scuff pads on the toe. Cambrelle lining Nylon inner sole with removable arch support pad. Technomicro is used as a base material. Closable air vent. Double stitched in all high stress areas. All bolt on parts are replaceable. Full length zip open entry. Dual compound sole. DuPont polymer toe shift pad. Perforated Teflon treated nylon lining. Shock absorbing heel cup.
Motorcycling: "The Sidi Apex boot offers great protection yet their focus on
convenience may be the greatest safety feature of all.