Unequal Uncap Baseball is supplemental protection for baseball caps. Combines FlexShell protection with a military grade composite that absorbs and disperses impact forces. Finally, serious, concealed head protection for pitchers that fits as a comfortable, ultra-thin liner underneath any soft ball cap. Fits virtually any ball cap. Simply Place-n-Play the UNCAP inside your soft cap. Fits fitted hats 6-5/8 thru 8. Small size features TriDur aramid fabric with camo pattern throughout inside of shell, large size features TriDur aramid fabric under padding only. Not to be worn as a batting helmet.