NASA (original) Logo  Patch Cap - includes velcro NASA 3" Patch 

This custom cap is absolutely One Giant Leap! A Richardson Style-168 cap, which alone, is a great cap and well known for being the best caps made in the USA...then add a velcro attachment to the face...and then add an AB Emblem, 3" NASA Patch?  You now have a very unique, very cool and pretty rare NASA cap that you will not find at any of the Space Centers! 

You can add any other round patch on the cap, as long as it has velcro on it. You can always add velcro.