The SIDI Adventure 2 Gore-Tex boots are high-performance motorcycle boots designed to bridge the gap between street-touring comfort and off-road protection. Technical Specifications Materials: Upper is constructed from Full Grain Microfiber (a synthetic leather-like material that is lighter and has higher abrasion resistance) combined with Cordura and suede. Waterproofing: Features a Gore-Tex breathable and waterproof membrane. A key upgrade from the original model is the full-height 14-inch (approx. 35 cm) inner gaiter for better water protection. Safety & Protection: Flex System: A mechanical hinge at the ankle provides support and flexibility while helping to eliminate the "walking squeak" associated with the previous model. Armor: Includes a TPU shin plate, rigid shock-resistant heel cup, and internal/external ankle pads. Tendon Protection: Tongue-in-groove panels at the rear of the calf protect the Achilles tendon. Certification: CE certified to EN 13634:2017. Sole: Bonded non-slip rubber lug sole designed for grip on both pegs and off-bike terrain. The sole is resolable. Closure System: Uses two replaceable micro-adjustable cam-lock buckles with memory-retention straps, combined with a large Velcro upper flap. Fit and Availability Sizing: Available in European sizes ranging from 39 to 50. Fit Note: Reviewers and retailers frequently note that these boots tend to run small and narrow. It is often recommended to order one size up if you are between sizes. Colors: Generally available in Black, Tobacco (Brown), and sometimes Gray or Military Green.