The CamelBak MULE is aptly named - it really, truly, is a work mule. While originally billed as a mountain biking day pack, the MULE is suited for other types of adventures, namely hiking, because it has about one million pockets (okay, eight), a light frame, and hugs your body when moving fast.

Hydration packs are designed principally to transport water and make drinking convenient and efficient. In fact, with most hydration packs, you don't have to stop, or even slow down, to take a sip of water; you simply grab the drink tube that's connected to the included water reservoir (sometimes called a bladder).

I've Hiked All Over the World and Can't Recommend This Camelbak Enough. It keeps me hydrated and hands-free, and doubles as a daypack. All products featured on Condé Nast Traveler are independently selected by our editors.

A hydration pack or drink bag is a type of hydration system built as a backpack or waistpack containing a reservoir or "bladder" commonly made of rubber or flexible plastic. The reservoir contains a capped mouth for filling with liquid and a hose that allows the wearer to drink hands-free.

CamelBak says "it's got everything you need and nothing you don't" and we mostly agree. Although this is a mountain bike oriented model, we that found hiking and trail running are also within its capabilities.

The M.U.L.E. EVO is properly weatherproof and, in typical Camelbak fashion, it appears to be very well made. The basic fit and design is similar to the Chase and Chase Protector vests, but the M.U.L.E. sits much higher.

No evidence of specific harm has been found tied to hydration powders, but it is certainly possible to develop an electrolyte imbalance. For instance, too much calcium has been tied to kidney stones, while excess sodium can raise blood pressure and, paradoxically, cause dehydration.

Electrolyte packets can be handy for supplementing workouts or helping a stomach bug, but you don't necessarily need to drink them every day. A steady stream of water throughout the day is usually all that's needed for a healthy person.

You are paying for the name brand. But with that name brand comes all of their product research and quality materials. That, along with their excellent warranties to back up their products. As they say, you get what you pay for.

Fewer Chemicals. Just like our plastic bottles, CamelBak stainless steel water bottles are BPA, BPS, and BPF-free. And they're free of other harmful chemicals. Stainless steel water bottles allow you to stay hydrated throughout the day while minimizing harm to the environment or to your body.

The Back Panel / Harness is made from Recycled Poly Airmesh. Interior Pocket is made from Recycled Poly Pocket Mesh. Through a partnership with 1% For The Planet, one percent of sales of EcoSmart products will be donated to nonprofits dedicated to protecting the planet.

While many of our packs have weatherproofing features built in, in the event of heavy rain, you can instantly waterproof any pack with our Rain Cover pack accessory - it's lightweight and super easy to use!

You are paying for the name brand. But with that name brand comes all of their product research and quality materials. That, along with their excellent warranties to back up their products. As they say, you get what you pay for.

What happens if you have too many electrolytes?

• Confusion and irritability.
• Irregular heart rate (arrhythmia).
• Breathing difficulties.
• Fatigue.
• Headaches.
• Muscle cramps or weakness.
• Diarrhea or constipation.
• Nausea and vomiting.

Signs of fluid and electrolyte problems like mood changes, confusion, muscle pain or weakness, a heartbeat that does not feel normal, very bad dizziness or passing out, fast heartbeat, more thirst, seizures, feeling very tired or weak, not hungry, unable to pass urine or change in the amount of urine produced, dry ...

So how much fluid does the average, healthy adult living in a temperate climate need? The U.S. National Academies of Sciences, Engineering, and Medicine determined that an adequate daily fluid intake is: About 15.5 cups (3.7 liters) of fluids a day for men. About 11.5 cups (2.7 liters) of fluids a day for women.