ALPINESTARS RACE V3 LONG SLEEVE TOP ALPINESTARS RACE V3 LONG SLEEVE TOP ALPINESTARS Alpinestars Race V3 Base Layers take all the technology and features from the award winning previous Race V2 series and improves every area. Now constructed with Lenzing FR®; an innovative natural viscose fiber that affords exceptional flame resistance and protection against heat transfer. This Formula 1 specification underwear is extremely lightweight and thin, while being incredibly soft to the touch for greatly enhanced comfort when wearing a driving suit. All Alpinestars Race V3 underwear is certified to both FIA 8856-2018 and SFI SFI 3.2A/5 standards Details: Manufacturer: Alpinestars Manufacturer part number: 4754520 Color: Gray Sizes: S - XXL Certifications: FIA 8856-2018 & SFI 3.2A/5 Formula 1 specification underwear, constructed using an innovative flame resistant technology developed by Alpinestars. Lenzing FR® is a special natural viscose fiber with unique thermal insulation and permanent flame resistance properties that help prevent heat stress and heat stroke. Elongated rear profile for improved fit in the seated position. Fabric construction is soft to the touch ensuring a pleasant feel against the skin.