I have to give this product from Outdoor Products two thumbs up for building such a durable and well thought out hydration bag. The pockets are will built and have of room for the basics needed for a short 5 to 12 mile ride in the Arizona desert. I have used it for well over a year now with no problems with the pocket zippers, or bag material. The hydration bag hold 2 liters of water and is easy to get in and out of it's compartment and it stays upright without using the velcro holiding strap. The bite valve can be turned off for transportation to tailhead, so you don't loose water before you get there. As hydration bags go, for the size, quality, and price point, it is a bargain.