SPIbelt Original Runner's Belt

I got this the day before I would be running in my first marathon, it is adjustable, so sizing shouldn't be an issue. I've used this in 2 marathons now, both times I've put a cell phone and at least one pack of gel blocks in there, it expands so there was still more room that I could have used. I would suggest putting any electronics in a zip lock or sandwich bag, as you may sweat through a tiny bit, but I haven't had any problems as of yet the few times I've forgotten. All in all this is a great product, would definitely recommend for people that want to exercise with something similar to a phanny pack but smaller and better.