Polarpak

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.

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

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.

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

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.

I have compressed disks in my back from years of hauling huge backpacks, so I was looking for something that wouldn't set it off on shorter hikes. This little pack is great for a short day hike. Nice non-bulky padding, lots of little pockets for keys and kleenex, and the water stays fairly cool. Pretty comfy as long as you take the pump with you to keep inflating it to keep it tight against your back. But the water capacity is not enough for a long day hike, unless there is a refil station somewhere. Nice, easy to use little product though (I don't know where the "hard to refill" thing was coming from; it's just like a Camelbak and the detachable tube is a nice feature.)

Bought 3 more for family and friends. Snug at the back and provides some lumbar support without a lot of weight. Much better than pulling bottles in and out of a belt.

This concept seemed like a good idea. Pump air into the pack and let the pressure due its thing. It worked well for the first few drinks, but then ran out of juice, and that was after 40 pumps. The bladder is only 24 ounces, kinda on the small side, and the hose attchment placement makes getting full use of the water a little difficult, 40 oz would have been better.

After running my first half marathon, I was looking for something exactly like your product. I love it. I can't wait to run the next race with the pack. It holds my keys, energy cubes and lots of water and is adjustable.

I have been using the pack for longer runs because I don't like carrying a water bottle. I like the pressure feature and the ease of using the tube and replacing it. I also like all of the zipper pockets and mesh pockets. Although the water in the tube gets warm, the water in the pack stays nice and cool. The only thing I don't really like is that it is a little uncomfortable around my waist in front.