Alpinestars ST-1 Waterproof Jacket
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.
- 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
- 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: 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
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Sizing Information
These jackets are sold in US based “alpha” sizes, so selecting a size is basically pretty easy. The size Medium and XL jackets fit Huey and Dewey, our Fit Check mannequins very nicely! Also, we checked several sizes with a tape. We found the sizing to be comparable to standard men’s clothing sizes. So our primary advice would be to choose the size you normally wear in men’s clothing.
Alpinestars publishes a super-complicated size chart which can be used to pick a size based upon your chest and waist. We’ve condensed their chart down to make it easy to read (see below). You can use this size chart to check your own measurements against the size chart to make sure the size you select will work. Choose a size that is big enough for both your chest and belly.
| Jacket Size | Chest Range | Waist/Belly Range |
|---|---|---|
| Small | 38 | 36 |
| Medium | 41 | 39 |
| Large | 43 | 41 |
| XL | 46 | 44 |
| XXL | 49 | 47 |
| XXXL | 51 | 49 |
| XXXXL | 53 | 51 |
