Alpinestars GP Plus v4 Suit ::

Alpinestars GP Plus v4 Suit

  • The Tech-Air® Ready GP Plus v4 leather suit is a complete revolution of the existing v3 model featuring an all-new construction including a blend of Flex Plus racing bovine leather, Alpinestars Composite Stretch Plus material, Matryx®, HRSF, and GP DFS sliders perfect for the sport and track rider looking for an upper mid-level suit with the latest material innovations
  • The GP Plus v4 features new Flex Plus race leather, specially tanned and refined in Italy, ultraflexible Flex Plus race bovine leather that is highly adaptive to the body, supporting a 6% adaptability ratio which is 80% more than that offered by regular bovine leather, the result means that the GP Plus v4 Leather Suit provides unrivalled comfort, feel, freedom of movement and precise fitment
  • The Flex Plus race leather meets Alpinestars’ Professional racing standard in terms of abrasion and tear resistance, while being 10% lighter than standard bovine leather With A-CS ® Plus, the stretchability ratio provides 20% additional elongation and tear resistance is increased by 300% versus leather
  • 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
  • Perforation of the Flex Plus race leather is provided all over the upper chest, abdomen, and thighs
  • The GP Plus v4 also incorporates strategically placed lightweight and breathable Matryx ® material panels 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 5
  • Another benefit of using A-CS ® Plus is that it offers high breathability with a lower weight and lower profile than leather accordion paneling
  • As for other construction features, the GP Plus v4 has HRSF stretch inserts in the crotch, back of legs, inner arms, and pectoral areas
  • The suit also incorporates GP DFS shoulder, elbow, and knee sliders for protection
  • Sporting soft stretch wrist and ankle cuffs the suit also has and a detach – able comfort liner with biostatic Polygiene ® treatment to keep it feeling and smelling fresh
  • Providing the GP Plus v4’s impact protection, race-proven GP-R elbow, forearm, knee, and shin armor, and Nucleon Race shoulder armor are incorporated in the suit
  • 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

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Sizing Information

Choosing a suit depends primarily upon three measurements; chest size, belly size and height. Race suits are cut with a very trim fit which is designed to fit skin tight over underwear or very light clothing. With most suits, the protection (back, chest and/or air bag) is optional and, when installed in the suit, will make them fit smaller, so you’ll want to think about the optional armor before selecting a size.

To select a size in a race suit, we highly recommend you measure your chest and belly with a tape (it is easier if you ask a friend to help). If you need some measuring help, take the link below for detailed instructions. Once you know your chest and belly measurements, you’ll want to choose a size from the chart that will be big enough for both. Before selection, you’ll need to add to your measurements for the addition of optional armor. Generally speaking, we recommend adding 1” to your chest and belly if you plan to add a back protector, and add an additional 1” to your chest for the addition of chest armor (if the suit is equipped to accommodate Alpinestar’s air bag system and you plan to install the air bag instead of armor, we suggest adding 1” to your chest and 1” to your belly).

Unlike separate jackets and pants, the fit of a suit is highly dependent upon your height. And since the fit of both the pants and the upper part of the suit are determined by the single size you choose, it’s pretty important that your height fall within the recommended range. To compensate for being too tall or too short for your ideal size, you can up-size or downsize to some degree, but you’ll be compromising the fit in other areas. Some riders who are much too tall or too short for standard sizing often opt for a custom made suit since off-the-rack suits just won’t work.

Alpinestars offers very complex sizing charts on their website, and if you want to dig more deeply into the sizing issue, I’d suggest visiting their website, but for sake of simplicity, we’ve condensed their basic sizing advice down to the chart below.

Euro Size Max Chest
Max Belly
Height Range
46 37 31.5 5’6”-5’7”
48 38.5 33 5’7”-5’8”
50 40 34.5 5’9”-5’10”
52 41.75 36 5’11”-6’
54 43.25 37.75 6’-6’2”
56 45 39.25 6’2”-6’3”
58 46.5 41 6’3”-6’5”
60 48 42.5 6’3”-6’5”
62 49.5 44 6’5”-6’6”
64 51 45.5 6’5”-6’6”

Need help measuring? Get it here.