- The GP Plus v4 also incorporates Alpinestars Composite Stretch Plus, A-CS® Plus, material on the suit's side torso and shoulder blades, offering lower weight, and increased flexibility and freedom of movement. With A-CS® Plus, the stretchability ratio provides 20% additional elongation, and the tear resistance is increased by 300% versus leather. Another benefit of using A-CS® Plus is that it offers high breathability with a lower weight and lower profile than leather accordion paneling.
- The GP Plus v4 has lightweight and breathable perforated Flex Plus race leather on the suit's torso for optimal ventilation, especially when the suit is worn with Tech-Air® Airbag Systems like the Tech-Air® 10 or Tech-Air® 5.
- Providing the GP Plus v4's impact protection, the suit has race-proven GP-R elbow, forearm, knee, and shin armor, as well as Nucleon Race shoulder armor incorporated in the suit, resulting in a AAA CE Rating. For the ultimate in rider protection, the GP Plus v4 is also fully Tech-Air® Ready for use with the Tech-Air® 5 or Tech-Air® 10 Airbag Systems and provides a convenient pocket on the forearm for the Tech-Air® 10's remote LED panel.
- As for other construction features, the GP Plus v4 has HRSF stretch inserts in the crotch, back of legs, inner arms, and pectoral areas, and Matryx® material on the lower leg for weight savings and breathability. Perforation of the Flex Plus race leather is provided all throughout the upper chest, abdomen, and thighs. The suit also incorporates GP DFS shoulder, elbow, and knee sliders for protection, and Bioflex hip armor. Sporting soft stretch wrist and ankle cuffs, the suit also has and a detachable comfort liner with biostatic Polygiene® treatment to keep it feeling and smelling fresh.