Polarpak Flowjo Hydration Waistpack

Loved the fact that it rests on your hips vs. shoulders as do those carried in a backpack. Very accessible as you hike. I used it on our Inca Trail hike...boiled water needed to be cooled before adding it to this pack. Great extra storage pockets for small valuables.

This is perfect for runs under an hour. Easy to use.

Have used this for 3-hour hikes - plenty of water. Water valve, container, etc worked just fine. Wish the zippered pocket were just a tad bit larger; hoping that come winter, it will hold my string cheese, sandwich and candy bar when downhill skiing; looks promising.

Very simple,compact and well made. Limited capacity restricts use to day hikes.

The overall build quality is good. I like the two pockets on the belt that I use for car keys, multi tool, and cell phone. I love the holster for the mouthpiece that keeps it clean and makes it easy to both retrieve and put back. The amount of water is good enough for short to medium length rigorous exercise. It is easy to fill. I find the "moflow" system to be a bit of a gimmick. Pros: It is easy to use the pump and add air to the reservoir which makes the water flow more strongly for drinking and also helps hold the shape of the bladder so you don't need to adjust the belt as often for a tight fit. Con: Problem is that it only works for maybe the first 33-50 percent of water usage and then there is not enough air pressure to assist with the flow of water. When there is no help from added air pressure, the mouth piece for this pack has much less flow that most hydration packs. You have to bite and suck to get a drink. All in all I like it and use it often. I prefer hip hydration over backpack hydration when I can find a decent system and don't need more water.