Nothing wrong with a h-bar bag. I'll mention this as an alernative. It is very handy and I liked them so much that when they came out with the newer, larger version, I bought two and gave my older one to my wife. They are not 100% waterproof. They are large enough to hold a 32 Oz. Nalgene or 32 Oz. Growler.

https://www.revelatedesigns.com/inde...ountainFeedbag

I put my wallet, phone, keys, etc. on the right side. The left I use for whatever...maybe a layer of clothing.