An excellent all-weather textile pant with a fixed waterproof membrane and class-leading internal protection incorporated into its multi-panel chassis, the AST-1 v2 Waterproof pants are equipped with pre-curved legs and an articulated knee design for enhanced comfort and durability.

Multi-material main shell construction for the optimum blend of durability, protection and light weight.
Nucleon Flex Plus knee and hip protectors for protection against impacts.
Internal knee compartment allows adjustments of protection to fit various leg lengths.
Fixed waterproof and breathable membrane for effective all-weather performance.
Ventilation opening for high levels of cooling airflow.
Pre-curved leg construction for enhanced fit and comfort in the riding position.
Hand pockets for real-world practicality.
Hips compartments can be upgraded to incorporate Alpinestars Bio-Flex hip protectors.
Reflective details.
Hook and loop waist adjustments belt for a precise fit.
Waist connection zipper for secure integration with Alpinestars riding jacket.
Premium YKK zippers for durability.
According to European statutory law the CE mark is a conformity requirement for the marketing of this product. The following standards apply to this product:
CE Category II PPE Regulation (EU) prEN 17092 A class.
CE Level 1 EN1621-1:2012 Alpinestars Nucleon Flex Plus knee and Bio-Flex hip protectors. (Bio-Flex hip protectors are available as an accessory upgrade).