Durable and lightweight polymer shell. Dual-density EPS (Expanded Polystyrene) liner. Custom molded rubber trim with integrated nose guard. Three shells and four EPS sizes provide a precise fit. Removable and washable comfort liner and cheek pads absorb sweat while providing ventilation.All FLY helmets have TFV (True Functional Ventilation). 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. PO BOX Addresses: Please provide BOTH the PO BOX and PHYSICAL ADDRESS. We can not mark items as "gifts" or change the value. Some items may have a slightly different appearance than what is shown in the picture. Please review the entire description to verify proper fitment.