Buckle closure Constructed with an advanced reinforced polyfabric textile for durability and Alpinestars exclusive Drystar membrane for 100 per cent waterproof performance in wet weather conditions Constructed with an advanced reinforced polyfabric textile for durability and Alpinestars exclusive Drystar membrane for 100% waterproof performance in wet weather conditions. Removable long thermal liner. Efficient direct ventilation ports strategically positioned on thighs for high levels of airflow. Pre-contoured leg construction with knee stretch panels insert for optimum riding comfort. Removable and positional-adjustable knee protectors. Reinforced polymer-printed texturing in critical knee areas for added abrasion resistance. Integrated reflective details. Adjustment waist system features buckle and stretch material for an optimized fit. Cargo-style pockets for real-world practicality. Adjustable, removable bib braces for an improved comfort fit. Nucleon Flex Plus knee with Bio-Flex hip protector compatibility (Bio-Flex hip protectors are available as an accessory upgrade, sold separately).