I run/walk plus size 5k and 10k, am currently training for a half marathon, need a vest to hydrate and make phone calls you while walking at a cardio/racing pace for 2-4 hours straight. There is currently no vest on the market that fits my body, but this fits snugger than any other I have tried. It's a universal size, supposedly fitting drawers up to 50 inches, and works on mine, which isn't exactly 50 inches. It's not ideal, but it's the only one I've found that actually works as intended forβ¦