I am going to start bringing my own hats to my sessions, the default ones do the job but I want to maximize my enjoyment. I have never brought my own to a hobby session before; I read on another board that I should bring an unopened box instead of 1-2 loose ones but that discussion was about indies. Is this also true for kgirls? I am willing of course but that would not be ideal. Hopefully I can at least use loose ones with girls I've repeated with multiple times and already know me.  

Let you bring your own and they don't have to be in a sealed box, but let them open the wrapper and put it on you so they can have a quick look that it hasn't been tampered with. However, there are some girls as we've learned recently that may not care about tampering. In fact, you could probably cut the end off if you wanted. Lol.  

...BigPapasan resembles that remark!

Japanese have smaller dicks, just that the Japanese condom companies make smaller condoms.  I have no clue why.  Its just an observation from having tried some.