Alpinestars Fluid Kepler Jersey

Entry-range MX jersey in the Kepler graphic

The Fluid Kepler Jersey is Alpinestars' recreational motocross jersey in the Kepler colourways. Fluid is the entry range, taking its cues from the Supertech, Techstar and Racer lines but cut for comfort rather than race-day tightness: a lightweight polyfabric that wicks moisture and breathes, with mechanical stretch in the fabric and an ergonomic pattern tailored to the graphic, so it moves with you without feeling like a compression top.

Sizing and fit

Sizes S to 2XL in two colourways: Blue and Purple/Orange. Relaxed athletic fit, so most riders take their normal size and still have room for a roost guard underneath. Extended rear hem to stay tucked, and a sport collar. Women's cut: the Stella Fluid Kepler Jersey.

Match it up

Pairs with the Fluid Kepler Pants in the same colourways. Add Radar Gloves and an A-1 Roost Guard to finish the kit.

The Fluid Kepler Jersey is a performance-driven MX jersey designed for recreational motocross and off-road riders who want comfort, mobility, and a clean race-ready look. Constructed from lightweight, breathable, moisture-wicking polyfabric with mechanical stretch, it takes inspiration from Alpinestars' premium MX lines and is optimized for lasting comfort on demanding terrain. The relaxed athletic fit, longer rear coverage, and sport collar deliver easy movement and dependable comfort on the bike.

• Mobility: Relaxed, athletic fit with an ergonomic cut supports unrestricted movement and precise control in the riding position.
• Coordinated style: Distinctive, aggressive colour combinations are designed to pair with the Fluid Pants for a unified race-ready kit.
• Advanced polyfabric construction is lightweight, moisture-wicking, and breathable, with mechanical stretch for added durability.
• Ergonomic jersey patterning is tailored to complement the graphic layout of the MX27 Fluid line.
• Extended rear hem provides added coverage through the back panel.
• Sport collar neck construction is integrated into the jersey build.
• Cut longer in the rear for greater coverage when riding.