Alpinestars Stella Fluid Kepler Pants

Women's MX pants in the Kepler graphic

The Stella Fluid Kepler Pants are the women's cut of Alpinestars' entry-range motocross pants, in the Kepler colourway, for riders who want all-day comfort on varied terrain rather than a race-tight cut. The chassis is lightweight 600D polyfabric with reinforced 600D on the seat and knees, synthetic leather on the inner knees for wear against the bike, reinforcement at the back yoke, upper knees and backs of the legs, and extended stretch corduroy panels with a pre-curved leg so the pants move with you. Mesh lining, ratchet closure and a zip fly.

Sizing and fit

Waist sizes 28 to 34 (inches). It's a women-specific pattern with a 3D cut, and the fit is sport rather than race, with a streamlined silhouette that still leaves room for knee guards at your normal size. The ratchet closure fine-tunes the waist. Men's version: the Fluid Kepler Pants.

Match it up

Pairs with the Stella Fluid Kepler Jersey. Add Stella Full Bore v2 Gloves and SX-1 v2 Knee Guards.

The Stella Fluid Kepler Pants are women-specific MX pants designed for motocross riders seeking all-day comfort, mobility, and confident performance on varied off-road terrain. Constructed with lightweight yet durable 600D polyfabric, stretch corduroy panels, and pre-curved ergonomic design, the pants optimize freedom of movement during riding. Reinforced zones and secure ratchet waist closure ensure lasting comfort and dependable fit.

• Women-specific fit tailored for female riders with secure feel and natural movement.
• Sport fit performance with streamlined, race-inspired silhouette.
• Ergonomic patterning using 3D cut construction.
• Stretch panel placement and pre-curved leg profile for easier movement and reduced fatigue.
• Reinforced 600D polyfabric on seat and knees.
• Synthetic leather on inner knees for durability.
• Reinforcements on back yoke, upper knees, and leg backs.
• 3D pattern construction with extended stretch corduroy panels.
• 600D polyfabric main chassis.
• Mesh lining, ratchet closure, zippered fly.