The ST-1 Waterproof Jacket is designed for riders seeking all-weather performance and ergonomic comfort, featuring a fixed waterproof liner and detachable thermal liner for versatile warmth. With modern style and adventure-touring-inspired details, the jacket offers optimal mobility with pre-curved arms and ergonomic elbows. Vent panels on the chest enhance airflow for improved breathability, while expandable cargo pockets provide practical storage. Paired with the ST-1 WP Pants, this jacket delivers a complete road touring outfit for wet and unpredictable riding conditions.  Alpinestars ST-1 Waterproof Jacket