I am 5.11 and weigh 172. I am looking for a travel BC, so I tried the zuma at our lds, the medium one is way too short (I guess I have a long back). The large one is the right size length wise but the bottom strap can not be made tight enough. I guess my belly isn't big enough is there a way to fix the zuma so it would fit me, or does anyone have suggestions for other travel BC that I should try? I prefer quick release weight system.