Until you catch that loop on the mirror of a car. Fortunately, the loop would catch on the mirror of a parked car, because it's on the right side of the bag, and I am in America. Should you shoulder the bag with the opening side toward your body, it could get caught by the mirror of a passing car, assuring disaster. When I was riding in the wide open streets of Mesa -- this was likely not a problem. In San Francisco, however, where I might actually touch moving vehicles - or squeeze tightly between them, or they squeeze tight between me, this is a real serious life threatening risk.
So -- let's fix this. First -- flip the attachment point of the strap around and re-attach, then thread it back through it self to make sure it stays put. Open the clamp and take all the slack material out of the loop in the strap and flatten it against the bag -- then secure the clamp against the strap. If you don't know how this works throw the bag away. Just kidding.
Find a 2 inch Travato or similar buckle and cut the strap at a point below your shirt pocket and insert the buckle. Adjust it accordingly.
If you want you can also apply the same logic to the crappy waist strap that comes with the bag and increase it to 1 1/2 inches.
Always be safe -- and think ahead to stay alive.
