Ankle and calf type will definitely determine comfort. I have fairly large calves with thin ankles (cyclist) so it usually requires a readjust once or twice throughout the day for maximum comfort. However, I never feel as if it is sliding or shifting, even when going up and down stairs or doing a lot of walking. Like everything else, it takes a little getting used to.

The magazine pouches are very secure and there is no concern of a magazine falling out. These are made for small single stack magazines. I have carried a double stack .45 magazine in it once, but it didn’t feel secure and was at the very limits of the velcro retention straps. It holds two magazines for a Ruger LC9 quite nicely. Even the magazines with the pinky extension fit well.

This is a great option for carrying extra magazines discreetly.