WTX-7 AIR The carbon-fiber Sparco WTX-7 Air Helmet represents the pinnacle of Sparco helmet design. Designed using the latest F1 wind tunnel technology, the WTX-7 Air features a light-weight carbon-fiber shell, tooled in an advanced Sparco autoclave. 2 different outer shell sizes are spec-ed, providing a better fit and lighter weight depending on the helmet size. A removable inner liner allows for easy cleaning, while internal channels allow for a multitude of accessories, such as drink-tubes and intercoms (not included).