ALPINESTARS ST-1 Waterproof Jacket

The Alpinestars ST-1 Waterproof Jacket is built for riders who want consistent comfort and weather protection for long-distance road touring and changing conditions. A fixed waterproof membrane delivers dependable wet-weather performance while maintaining breathability, and front chest vents increase airflow across a larger surface area to help regulate temperature on the move.

Designed with a comfort-focused touring fit, the ST-1 features pre-curved arms and ergonomic elbows to support natural movement and reduce fatigue on extended rides. A detachable thermal liner (80g insulation in the torso and sleeves) adds cold-weather versatility, while multiple storage pockets and fit-adjustment points help keep essentials secure and the jacket dialed-in for the ride.

Key Features

Comfort fit with pre-curved arms and ergonomic elbows for extra freedom of movement
Redefined, modern shoulder design with Alpinestars stylish branding gives the jacket an adventure touring inspired look
Fixed waterproof liner offers wet-weather performance
Vent panels on the chest provide cooling airflow, creating an increased surface area for air exchange, improving breathability and offering optimal riding comfort
Ergonomic cargo pockets’ slim design, with built-in expansion, provides added storage capacity
Detachable thermal liner, 80g torso, 80g sleeves with snap button connections to anchor the liner to the jacket
CE Level 1 rated Nucleon Flex Plus elbow and shoulder armor for effective impact protection
Fully CE certified motorcycling garment to CE - Category II EN 17092-4:2020 – A Class
CE Level 1 Nucleon Flex Plus impact protection, Category II EN 17092-6:2020 – C Class Impact

Rider Fit & Feel

The ST-1’s touring-focused cut, pre-curved arms, and ergonomic elbows are designed to feel natural in the riding position, while biceps, collar, cuff, and waist adjustments help fine-tune comfort. An extended rear cut adds coverage, and the pant connection zipper helps reduce wind ingress when paired with ST-1 Waterproof Pants.

Available Options

Colors: Black; Ice Grey/Black/Yellow Fluo; Khaki Sand/Black/Red Fluo
Sizes: Small–4X-Large

Shop the Alpinestars ST-1 Waterproof Jacket at All American KTM, your nationwide source for premium motorcycle riding gear and apparel.