Just wore it for a 14-mile run, with and without a shirt the strap is comfortable and soft enough to cause no issues or chafing. The main pocket is more than large enough to hold any modern XL phone, and the smaller one a Gu and (not XL) wallet. Seems very good quality and like it will last a long time. The ONLY drawback I've found so far is minor and that the waist straps are really long if you're around 5'9" and 180 lbs, with 32-34" waist. Very easy to access while running though, and looks good.