Alpinestars Stratos Racing Suit - Boot CutReplacing the budget priced Delta, the Alpinestars Stratos racing suit offers a protective 3 layer construction without any weight penalty. Certified to SFI 3. 2a 5 fire resistant standards, the Stratos is designed with the same anatomically optimized fit that Alpinestars suits are known for. The shiny outer layer gives the suit a vibrancy that isn't generally found at this pricepoint, helping make sure sponsor logos are extra visible. Driver comfort