Sidi Rex Air Motorcycle Boots White/Red 391 – Ventilation & Racing Protection at the Highest Level

The Sidi Rex Air Motorcycle Boots White/Red 391 are the perfect choice for all sport riders who expect top performance – even in high temperatures. This premium racing boot combines maximum breathability, highest safety standards, and a precise, individually adjustable fit.

Whether you're on the racetrack or riding sporty tours: This boot delivers the performance you need to safely push every limit.

Tangible More Airflow – Made for Hot Days

With its perforated microfiber material, the Rex Air ensures exceptionally high air circulation.
The result:

• Cooler Feet

• Less Moisture

• More Comfort on Long and Hot Rides

The integrated Air Ventilation System is positioned exactly where it has the greatest effect during sporty riding.

Pro-Level Safety with High-Tech-Protectors

Sidi relies on state-of-the-art safety structures for the Rex Air White/Red 391:

• High-quality TPU Impact-Protectors

• Fiberglass-reinforced Exoskeleton Structure for Maximum Stability

• Replaceable Shin Plate & Slider

• Asymmetrical Heel Cup for More Control

• Side-Slip Design for a Secure Contact Point with the Motorcycle

These technologies come directly from the professional realm – developed for maximum performance and safety.

Fit Like Tailored – Thanks to Dual-Dial System

With the innovative Dual-Dial closure, the boot can be adjusted to the millimeter.
Advantages:

• Optimal Pressure Distribution

• Firm, Yet Comfortable Hold

• Individually Adjustable on Both Sides

• Quick & Precise to Operate

The Rex Air fits perfectly – whether for narrow or more robust calves.

Comfort & Control in Sport Riding

The Rex Air combines stability with freedom of movement:

• Highly abrasion-resistant upper material

• Intelligently designed flex zones

• High control during shifting & braking

• Secure grip in every corner

A boot that provides precise, sporty feedback on every ride.

Sidi & Sustainability

Sidi is actively committed to the UN Sustainable Development Goals and continuously works to reduce its CO₂ emissions – for responsible production with a future.

Product Highlights

• Color: White/Red

• Model number: 391

• Perforated upper material for maximum breathability

• Dual-dial system for individual fit

• TPU-Protectors & fiberglass exoskeleton

• Replaceable sliders & shin guards

• Racing-level stability and safety

• Comfortable, precise & durable

Conclusion: The Perfect Racing Boot for Hot Conditions

The Sidi Rex Air motorcycle boot White/Red 391 is ideal for riders who need full performance in heat – without compromising on safety, comfort, or fit. A true high-end boot for demanding sport riders.