Alpinestars GP Plus V4 Leather Suit

Advanced men’s one-piece racing leathers with adaptive composite panels

The Alpinestars GP Plus V4 leather suit combines black panels, red-fluo shoulders and white racing accents with a construction focused on movement. Flex Plus bovine leather works alongside composite stretch materials, fitted armor and GP DFS sliders. This model brings a distinct material package to our Alpinestars performance suit assortment.

Materials in motion

Flex Plus is the suit’s specially developed bovine race leather. A-CS® Plus stretch sections sit at the side torso and shoulder blades, while HRSF inserts support movement through the inner arms, chest area, crotch and rear legs. MATRYX® material is specified at the lower legs.

Perforated leather across the upper chest, abdomen and thighs introduces ventilation. The different materials serve different zones, allowing the one-piece layout to follow a riding crouch without relying on an entirely rigid leather shell.

Factory protection package

• Shoulders: Nucleon Race CE Level 1 armor.
• Limbs: GP-R CE Level 1 elbow, forearm, knee and shin protection.
• Hips: Bio-Flex CE Level 1 protectors.
• External components: GP DFS sliders at the shoulders, elbows and knees.
• Garment classification: Manufacturer-listed AAA under EN 17092-2:2020.
• Airbag integration: Compatible with Tech-Air® 5 or Tech-Air® 10 according to their fitting instructions; airbags are sold separately.

Chest markings, rear contours

A white sweep separates the red-fluo upper chest from the black torso. The large outlined star, ASTARS lettering and smaller MATRYX wordmark sit around the center zipper, while Tech-Air Ready branding appears higher on the chest. Red sleeves carry contrasting graphics, and a branded collar tab finishes the neckline.

Behind, the sculpted upper-back profile combines red-fluo sections, a black star panel and a white stripe. Contoured black panels lead toward large ASTARS lettering above the bright lumbar band. Red outer thighs display white Alpinestars graphics. At the knees, white star-marked external sections sit above black slider pucks, with red lower-leg panels completing the design.

Comfort beyond the shell

Soft stretch cuffs finish the wrists and ankles. Inside, the detachable comfort liner has Polygiene® treatment, giving the wearer a separate component to maintain according to its label. The suit also provides a forearm pocket for the Tech-Air® 10 remote LED panel.

Dialing your fit

Measure for the complete riding setup, including your base layer, boots, gloves and any compatible airbag. Follow the manufacturer’s guidance for the GP Plus V4 and check reach, torso room and joint alignment in a riding position. The gallery’s measuring illustrations can help locate body landmarks; check GP Plus V4 sizing with our team if you need assistance.

Review our return eligibility and original packaging requirements before using the suit, keeping the supplied tags and paperwork intact while deciding on fit.

Care by surface

Leather, collar and graphics: Dust with a soft cloth and patch-test only label-approved care products. Composite stretch and MATRYX sections: Avoid aggressive brushing, saturation or coating them with general leather conditioner. Liner and cuffs: Air after wear and follow their specific cleaning instructions. Armor, sliders and closures: Clear loose debris, inspect attachments and have damaged parts assessed.

Support the suit on a broad, strong hanger without compressing the hump or shoulder components. Keep it dry and away from direct heat; do not machine-wash or tumble-dry the assembled suit. Our advice on hanger support and breathable leather storage provides general storage context. The Alpinestars garment label takes priority for this mixed-material construction.

Ownership FAQs

Is A-CS Plus the same material as the leather shell?

No. A-CS® Plus is Alpinestars Composite Stretch Plus, used at the side torso and shoulder-blade areas. It complements the Flex Plus bovine leather and contributes flexibility and breathability without making every panel the same material.

Can the comfort liner be removed for separate care?

Yes. Alpinestars specifies a detachable comfort liner with Polygiene® treatment. Remove and clean it only as directed by its own label. A removable liner does not make the complete leather suit machine-washable.

What does the forearm pocket accommodate?

The GP Plus V4 includes a forearm pocket for the Tech-Air® 10 remote LED panel. It is an accommodation for the compatible system’s display; the airbag system and its equipment are separate purchases.

Do GP DFS sliders and internal armor perform the same job?

They have complementary roles. The external GP DFS components provide friction-control surfaces, while the internal shoulder, limb and hip protectors address impact protection. Keep both correctly fitted according to the manufacturer’s instructions.

Is this the GP Plus V4 Sprint?

This listing is for the GP Plus V4 shown in the photographs. GP Plus V4 Sprint is a separate model with its own construction and equipment specification. Compare the complete model name when selecting a suit or replacement components.