The one size, fully adjustable fit is a coaches dream. Cascade studied the eye patterns and vision fields to put lacrosses best facemask on the CPX. Shell: FreeFlow, HDPE, 13 Vents. Mask SightLine Vision--Titanium, Chromanium, Black. Chin & Visor: CPX, IM/HDPE, 5 Vents. Liner System: Gen 5 Fully Adjustable, Triple Foam Density, Memory Foam. Weight: 2lbs 2oz.