Product details:

D.O.T. Approved Advanced Polycarbonate Compact Shell : Lightweight, superior fit and comfort using advanced CAD technology. Impact Absorbing Multiple Density Expanded Poly-styrene Liner.. Easily convert from Street; shield & Visor to Dirt; Visor Only. Aerodynamic Adjustable Visor and Shell Large Eye Port for maximum visibility and superior goggle fit. 淎CSAdvanced Channeling Ventilation System: Full front to back airflow flushes heat and humidity up and out. SuperCool Moisture-wicking Interior: Anti-bacterial, removable and washable. Glasses Groove can accommodate riders who wear glasses. Includes: Anti-Scratch Shield HJP 510-200, Breath Deflector HJP 510-003. Weight: XS 3.47 lbs (1,575 +/- 30g), SM to MD 3.46 lbs. (1,573 +/- 30g), LG to 2XL 3.68 lbs. (1,673 +/- 30g). For proper fit and size measure the circumference of your head 1 above your eyebrows and around the largest portion of the back of your head.