Safety isn’t optional—it’s essential. The Rex Air Boot is built around a high-grade TPU internal structure and an external fiberglass-reinforced nylon exoskeleton to deliver serious protection where it counts. In the event of a crash, the boot is engineered to support controlled sliding, helping to reduce sharp force impacts. A single ankle brace with nylon and fiberglass provides joint stability, while the fully encapsulated heel cup and reinforced toe slider with an air intake ensure protection without compromise.

The Rex Air wraps the tibia with a dual-sided closure system, featuring SIDI’s exclusive Tecno-3 Push Dial made from high-density resin for long-lasting performance. This micro-adjustable system ensures a secure, personalized fit and is fully replaceable if needed. Combined with a removable arch support pad and elastic panels at the front and rear flex zones, the Rex Air offers unmatched comfort and support—even on the most aggressive rides.

Built for hot weather and hard rides, the Rex Air features a perforated Technomicro® base, breathable mesh panels, and strategically placed air vents—including in the ankle support brace—for continuous airflow. Inside, perforated Teflon-treated nylon and anti-abrasion Cambrelle® lining wick moisture and resist heat buildup, keeping your feet cool and dry even in the heat of competition.

Engineered for responsive connection with your bike, the Rex Air features a low-profile dual-compound sole that delivers excellent grip without sacrificing feedback. The DuPont® polymer toe shift pad and reinforced toe slider enhance durability at high-wear points, while double stitching in stress zones ensures the boot holds up to the demands of top-level riding.