I personally think the gp4k and now the gp5k (have not tried myself) is puncture proof enough imo.
I have read others say the 4 seasons are better. i have no idea. but i have feeling they are right. otherwise why would so many people say these are better?
My own experience is this:
conti with 5mm of yellow "plus" foam/rubber inside. i rode these through a sea of heroin needles! for several years (maybe 10000km in total). and not one single time did they puncture and not one single time did my tires get aids. but lets just say i didn't really lick these ones.
you can can probsbly get by with only vectran/kevlar weave/fabric for a long long time though. it works for me at least.
Last edited by carlos danger; 06-15-19 at 01:31 PM.