Alpinestars race proven PU knuckle protection system features advanced airflow ventilation and thermoplastic PU for superior impact and abrasion resistance. Features Alpinestars race proven PU knuckle protection system features advanced airflow ventilation and thermoplastic PU for superior impact and abrasion resistance All leather construction with PU profile around vulnerable outer wrist Short glove design with extended cuff to protect external wrist area Reinforced external padding on thumb and re-enforced finger tops and sidewalls Patented 3rd and 4th finger bridge prevents finger separation and stops protection rolling off the fingers in the event of a slide Perforated leather fingers, finger gussets and palm for maximum cooling without compromising safety Innovative open back knuckle design with perforated top panel Accordion leather, stretch insert panel over thumb and on fingers for better flex and natural feel Synthetic suede palm with reinforcements for improved grip Velcro wrist closure TPR (thermoplastic rubber) detailing and printed logos