Durable and lightweight polymer shell Dual-density Expanded Polystyrene Expanded Polystyrene (EPS) Technology Custom-molded rubber trim with integrated nose guard Three shells and four EPS sizes provide a precise fit 1342 grams +/-25g (size LG), 2.95 pounds +/-0.06lb (size LG) Removable and washable comfort liner and cheek pads absorb sweat while providing ventilation True Functional Ventilation (TFV)-When in motion air is forced through multiple air intake vents, then passed through aligned vent channels in the EPS and exits out multiple rear exhaust vents High-flow mouthpiece is replaceable Included soft fleece helmet bag Optional cold weather kit with breath guard and ventilation plug kit: 73-48327