Review on Ultraspire Momentum 2.0 Hydration Pack - Minimalist 6L Vest with 4 x 550mL UltraFlask (Fluid Capacity - Sold Separately) by Rud Starks

I really wanted this vest to like it and I like it conceptually, but after actual full use in endurance racing and practice runs I have to say that it has serious flaws. Pros: Plenty of storage space, phone pocket is a favorite. Love the large front pockets perfect for another bottle or just storing "things" and it's handy. It breathes and fits well. This is where the compliments end. The bad ones (which make it almost useless for anything longer than a water bottle): The back pockets are in an odd position when walking or standing, their placement causes minimal or no issues, however, after running (and that would be what would have to be done in this vest), that's where the problems start. First of all, don't rely on magnets to prevent bottles from flying out. You are not stable. They kept jumping out of my backpack at the Buffalo Marathon (a great race, by the way). The bungee straps that are supposed to hold them in place fail, constantly slipping and needing readjustment, which is an issue given their location. Finally, where bottles and bungee cords hit the insides of your hands and can cause irritation, at least when they're not chafing. For short runs where you can only use the front bottle pocket, this backpack will do... Anything longer is a huge NOPE.