2 x bearing

Durable woven nylon construction

Weight    130 g / 4

That doesn't mean that they won't work just fine for XC and Enduro though

100 Percent Hypercraft XS Sunglasses - One Size Fits Most - Matte Black Smoke Lens Envelope Shipping 2 x bearingHYPERCRAFT XS introduces a new generation of athletes to the lightest, strongest and most dynamic performance shield on the market. Loaded with the same game changing UltraCarbon technology of HYPERCRAFT, this smaller scale shield is designed for those smaller faces, uncompromising women, and young athletes that demand bold performance eyewear. Highlights Designed in California Superior optics with Ultra HD lenses made from crack and chemical