The regular RAPDOM operator caps are pretty big. They fit people who are blessed with what can best be called "generous" sized heads. Basically big headed people. This is a high cut version of the same thing. It clears your ears by about 1 to 1.5 cm (centimeters, not inches) and also lacks a hard front structure. (There is no hard plastic insert on the front forehead portion of the cap, only the peak of the cap has that). So the result is it is easier to wash, and it is easier to use with glasses. It is still has the same velcro layout and such. I was initially a bit surprised by these differences, but I after wearing it for a few hours I expect that this might become my favorite cap. Very comfortable, breathable and easy to pack away.