ST Air

• The ST Air version features a fully perforated Lorica outer for maximum air flow.
• External ankle brace system.
• Composite inner sole.
• 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 (no Velcro!) replaceable, adjustable and aerodynamic nylon scuff pads on the toe.
• Lorica outer construction.
• Removable arch support.
• 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.
• 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.

• Dual Compound Sole
  
• Composite inner sole.

• The toe slider is made of nylon reinforced with fiberglass. It is fitted with a new air intake and an innovative non-spark alloy insert.
• External ankle brace system.
  
• Shock absorbing heel cup.
  
• DuPont polymer toe shift pad.
  
• Padded Achilles area.

The gear change shifter pad is molded of DuPont Techno-polymers, which ensure that the plastics qualities will not change in high or low temperatures. Sidi boots deliver a strong, consistent feel when you grab the shifter and blast through the next gear.

The three stage, shock absorbing heel cup is molded in three different densities of plastic that sets the Vertigo and Vortice series apart from all other sport boots. This system offers a built in shock absorbing range of 3mm. The heel cup's internal area is also fully lined with impact resistant thousand-air cell memory foam for and extra level of comfort and protection.

The composite inner sole of Sidi boots resists side to side compression, offering greater protection compared to the leather inner soles that our competitors use. The insole features a removable arch support and will never lose its dynamic characteristics, even after months of intense use. It's also water resistant and is designed to withstand high footpeg pressures.

Every bolt on component is available separately. If it's a part you can remove, it's a part we can replace. You can change the various components to replace items that have worn or damaged in a crash.