The Oakley Men's CarbonX Base Layer Long Sleeve Top in black will keep you protected from fire in the event of a collision. Made using CarbonX® fibers which carbonise and expand to eliminate oxygen and starve off flames, the lightweight top also has engineered seams for free movement. The adjustable underarm vents will also improve breathability to keep you feeling comfortable. - L.M. Features: Oakley Men's CarbonX Base Layer Long Sleeve Top Designed to protect you from fire in the event of a collision CarbonX® fibers carbonise and expand to eliminate oxygen and starve off flames Lightweight Engineered seams allow for free movement Adjustable underarm vents for better breathability SFI/FIA approved