This current issue Flight Deck Helmet is made by the David Clark Company, one of the leading manufacturers of aerospace equipment since 1941. The HGU24 & HGU25P are the same helmet with the exception of the headset, which is not included unless requested. The use of part number HSC-61C makes this an HGU-24P and the use of just the ear protector, 9AN/2 would make this an HGU-25P. This helmet is nearly fully customizable; you can choose between either the HGU 24 or the HGU 25. You can also choose to add assembly to the helmet, such as protector pad and shell for both sides of your chosen helmet. Your helmet also comes in eight different colors that you can choose from. Sun, Wind, and Dust goggles cost an extra $84, while extra hearing protection with no comms is an additional $49. Trust the five star reviews; your custom helmet will be the best you have ever had!