They're just regular silicone plugs, the Kaos ones I had I got a blow out from because I was being impatient and I just tossed them. These are very breathable, and I never had troubles with them falling out!
Thanks! They definitely are very painful :( I have quite a few pairs, I just wanna list them at different times so I know I don't forget about people and ill have the time and money to ship them out. The lighter ones can be placed in an envelope but the heavier ones I'm not sure about. Ill fan you back though!