Alpinestars Atom 2-Layer SFI-5 Suit The Alpinestars Atom Auto Racing Suit is a 2-layer Nomex suit featuring a semi reflective exterior finish and plethora of other features racers appreciate. Fully Stocked and Ready-to-Ship here at RacingDirect! Get the Look: Alpinestars - Atom SFI-5 Auto Racing Suit Bell - GT6 Pro SA2020 Closed Cockpit Helmet Alpinestars - Tech-1 Start v3 SFI-5 Gloves Alpinestars - SP+ SFI-5 Auto Racing Shoes