You trust one of those to hold your stuff when smashing down a rocky bridleway?
SWAT bibs: Yep, completely. It’s very secure – tight elastic, a smallish orifice (ooh er) and somehow a grippy texture to the fabric.
Tri jersey? No idea, never used one. If the pockets are secure enough and non-flappy then maybe I can see it working but it’s still a compromise and another layer that you definitely won’t want in summer. It’s basically a ghetto SWAT vest, innit?
That RaceFace thing is intriguing. It’d be nice to have it already loaded up and ready to go to minimise pre-ride faff, something you can’t really do with jersey pockets. Also I only have 1 set of SWAT bibs so it’s no good for very regular riding (A chance would be a fine thing at the moment).
Seriously though, just buy some SWAT bibs. They’re ideal.