Construction uses a highly breathable, perforated microfiber. TPU features are combined with ventilation zones and a new airflow system sole for breathability and superior ventilation. Evolutionary new shin plate design with ventilation windows strategically positioned to allow more ventilation without compromising the impact protection. Air vents on the TPU lateral calf, plus breathable mesh insert, improve comfort and reduce fatigue on short and long rides. Features Medial and lateral double pivot system for improved levels of flexibility and precision control. Engineered bi-density front flexion control is strategically positioned over the mesh area, combined with a dual front blade system and shock absorber insert, to offer mechanical progressive force release to dampen and absorb impact energies. Redesigned dual density TPU rear blade system is engineered to prevent hyperextension while offering improved flex control and impact resistance. Built into the Tech 10 unique and lightweight single-pivot co-injected foot chassis is the patented Dynamic Heel Compression Protector (DHCP), an innovative safety feature which includes a fully integrated collapsible heel area with an expanded polyfoam to absorb high impact energy during a crash. DCHP features a directional impact protection system which significantly reduces the effect of excessive, potentially injury-causing energy being transferred to the ankle and lower leg. DHCP has been developed and tested in the demanding circuits of professional Supercross and Motocross. Co-injected for strength and structure, the exclusive TPU and rubber compound panels provide superb levels of grip contact, durability, and heat resistance. The contoured calf protector ergonomically wraps around the rear leg and is constructed from a dual density compound rear blade system to offer progressive dampening of excessive torsional forces. Shin plate features a new anatomic design for reduced surface area and weight-saving. Completely re-designed sole with proprietary grip sculpturing to improve foot-peg performance, grip, and mud and water runoff. Exclusive dual compound sole is seamlessly integrated to the multi-density foot base structure with built-in support The sole offers superior durability grip and feel while riding, and improved performance on the shifter. The central sole insert features a micro grip and side hooking grip design. It is easily replaceable and Alpinestars offers a full sole replacement and boot repair service. Anatomically optimized for weight saving and ergonomics, the new mechanical buckle closure system features a nylon and fiberglass compound for improved durability and strength. The new slim-line buckle closure system includes high-impact bridge closures which are cold forged for precision and strength. The buckle closure system features memory and a quick release/ locking system with a self aligning design for easy, precise closure and improved riding performance and security. All buckles are easily replaceable. Innovative, lightweight upper combines advanced lightweight microfiber with an impact and abrasion resistant TPU shell. The foot shell features five different compounds in a single lightweight pivot to offer strength while maintaining flexibility and structural integrity. The foot shell incorporates heel and toe protection and is highly resistant against abrasion and impact while adding to the boot's overall durability. The foot shell also includes an integrated shank for support and structural integrity. Frontal protection features a dual closure system with an internal microfiber flap, plus hook and loop fasteners for a precise fit closure attached securely with a micro-adjustable, easy to operate lightweight buckle. The shin incorporates a unique TPU blade system engineered to prevent frontal hyper extension and offer greater flex control. Soft microfiber gaiter helps seal out excessive water and dirt entry, while the 3D mesh lining ensures improved air circulation and comfort. 3D mesh lining incorporates anti sliding suede on the heel area to keep the foot located inside the boot. Highly ventilated perforated padding for optimized ventilation and airflow. According to European statutory law, the CE mark is a conformity requirement for the marketing of this product. The following standards apply EN13634:2017.