Well, kydex doesn't retain moisture, let it get to the gun, & won't break down from hot & humid days.
I just find it uncomfortable, but I'm told that's because I haven't found the right one.
__________________
"Use human means as though divine ones didn't exist, and divine means as though there were no human ones." Baltasar Gracian
Integrated Close Combat
NRA Member
Glock 19, Kahr P45, Kel-Tec P-32, S&W 442, & Dan Wesson 14-2