Description Of Giro Fuse Helmet A light, durable helmet with top-level performance, progessive styling and technical features designed to perform in all conditions. The Fuse is the choice of riders like Alex Courdray, Dan Treadway and Ingrid Backstorm. Features: Sizes: Super fit Audio: Compatible with Tuneups, Tuneups II, Tuneups Construction: In- Mold / EPS Liner Ventilation: 16 Super Cool Vents Ventilation: Adjustable Thermostat Control Ventilation: Weatherstrip Removable Earpads Goggle notch Weight: 14.5 oz. 410g