The Alpinestars GP Plus v4 Tech-Air Ready Leather Suit is a high-performance race suit designed for sport riders and track-day enthusiasts who want advanced materials, dependable protection, and a precise fit. This Black/Red Fluo/Dark Blue suit is sized US 38 / EU 48 and features a complete construction update over the previous GP Plus v3 model. Its Flex Plus racing bovine leather is specially refined in Italy for improved flexibility, comfort, abrasion resistance, and tear resistance, while remaining lighter than standard bovine leather. The adaptive leather construction helps the suit move naturally with the rider while maintaining a secure, race-focused fit.
The GP Plus v4 combines Flex Plus leather with Alpinestars Composite Stretch Plus (A-CS Plus), Matryx, and HRSF stretch materials to provide enhanced freedom of movement, breathability, and reduced bulk. Perforated leather across the upper chest, abdomen, and thighs supports airflow, while lightweight Matryx panels on the torso improve ventilation when used with a Tech-Air 5 or Tech-Air 10 airbag system. A-CS Plus panels on the side torso and shoulder blades offer additional stretch and breathability compared with traditional leather accordion sections. HRSF inserts in the crotch, back of the legs, inner arms, and pectoral areas further support a comfortable riding position.
Protection is provided by race-proven GP-R armor in the elbows, forearms, knees, and shins, along with Nucleon Race shoulder armor and GP Dynamic Friction Shield sliders at the shoulders, elbows, and knees. The suit is fully Tech-Air Ready and includes a convenient forearm pocket for the Tech-Air 10 remote LED panel. Soft stretch cuffs at the wrists and ankles help improve comfort, while the removable comfort liner features biostatic Polygiene treatment to help maintain freshness during repeated use. Manufactured by Alpinestars, this GP Plus v4 leather suit carries manufacturer and vendor part number 3150523135748 and is an excellent fitment choice for compatible riders seeking a versatile upper mid-level racing suit with modern Alpinestars protection and airbag-system integration.
Features:
- Tech-Air Ready: Compatible with Alpinestars Tech-Air 5 and Tech-Air 10 airbag systems.
- Flex Plus racing leather: Provides adaptive comfort, race-level abrasion resistance, and improved tear resistance.
- A-CS Plus stretch construction: Delivers enhanced flexibility, breathability, and freedom of movement with lower bulk.
- Matryx torso panels: Support lightweight ventilation, particularly when worn with a compatible Tech-Air airbag system.
- Perforated leather: Strategically placed across the upper chest, abdomen, and thighs for increased airflow.
- Race protection: Includes GP-R elbow, forearm, knee, and shin armor plus Nucleon Race shoulder armor.
- GP DFS sliders: Shoulder, elbow, and knee sliders provide replaceable external race protection.
- HRSF stretch inserts: Located in the crotch, back of the legs, inner arms, and pectoral areas for riding mobility.
- Comfort features: Includes soft stretch wrist and ankle cuffs and a removable Polygiene-treated comfort liner.
- Fitment: Black/Red Fluo/Dark Blue Alpinestars GP Plus v4 leather suit in US 38 / EU 48.
- Part number: Alpinestars manufacturer and vendor part number 3150523135748.