This is the perfect accessory for my long-distance runs. It holds my car keys, cell phone, and personal safety alarm. It has a little loop on the inside to attach your car keys too, although it's honestly hard to lose anything inside of this belt. I'm 5'5" and 150 pounds and my medium fits just a little snug. However, I wear it up higher around my waste and I don't feel it's too tight or uncomfortable during a six-mile jog.