A review of hydration packs wouldn’t be complete without CamelBak, the company that created the category. And they clearly know that little things can often make the biggest difference. Well, a small feature of this "Best Of" pick is actually a big thing. A cool thing. The CamelBak M.U.L.E. Hydration Pack includes a water-resistant pouch to hold your iPod. So you can tackle the hill while you listen to Queen's 'We Are The Champions" or, if you're not feeling as strong, perhaps Jackson Browne's "Runn... FULL REVIEW

This "Best Of" hydration pack realizes that you not only get thirsty when you hit the trail, but hungry too. The North Face Hammerhead holds up to 100 ounces of your favorite beverage, and with a front and two side mesh pockets it also holds your energy bars and GORP, as well as keys, sun block and sunglasses. So even if your journey lasts more than 3 hours, you should have enough sustenance to get you through. The Hammerhead comes with a narrow profile perfect for singletrack riding, and the Nalgene ... FULL REVIEW

Heavy and hanging on your back, hydration packs can make you hotter, causing you to sweat more and, yes, you guessed it: need more water. It's kind of funny how that works, unless, of course, you're the one needing the water. The Deuter Race X Air Hydration Pack features a patented "AirComfort" mesh system to keep your back as cool and comfortable as possible. The suspension system in this hydration pack provides a compact, comfortable fit. Designed specifically with mountain bikers in mind, this "Bes... FULL REVIEW