Running Vests (hydration packs) have become a symbol of freedom among both road and trail runners, offering the ability to run outside for hours without the need to stop for water or supplies. Instead, you can keep all of your essentials within arm's reach and attached securely to your body, which prevents excessive bouncing or discomfort. While similar to hiking backpacks, running vests feature a more next-to-skin fit and vest-like design that helps to reduce the up-and-down bouncing movement of the pack when running. Equipped with easily accessible water bottles positioned on your sternum or a hose connected to a bladder strapped comfortably to your back, they not only quench your thirst but also allow for seamless hydration while running.

On top of providing easy access to hydration while on the run, running vests offer useful storage for carrying items as well. Need to refuel with energy gels and nutrition? Front pockets accommodate gels for a quick boost, while the rear compartments can store heartier snacks. And when unexpected weather strikes, these packs offer compartments to house lightweight jackets, gloves, and other necessities. No matter your running experience, choosing the best hydration pack for your needs can boost both comfort and safety on long runs. These vests will vary based on four key elements: fluid capacity, pack capacity, fit, and price range. In this article, we'll delve into the realm of running hydration packs, exploring their various features, benefits, and considerations for choosing the perfect pack for your running needs.

Decide How Much Water You Want to Carry
Fluid capacity, or the amount of water (or other hydration beverage) a pack can carry, is the main differentiating factor between vests. When referring to hydration capacity, we are specifically talking about the total amount of liquid a vest can hold using its included carrying containers. Often, packs will also be able to fit additional flasks, bottles, or reservoirs that can be purchased separately. The hydration capacity typically ranges from 20 ounces to 2 liters and is carried in bottles, flasks, or reservoirs.

Calculating Optimal Hydration for Your Journey
Understanding how much water to carry for different durations of runs or hikes is essential for a safe and enjoyable experience. The distance and intensity of your activity, weather conditions, and the availability of water sources all influence your hydration needs. For shorter runs or hikes, around 20 ounces of water might suffice, especially if you have access to water fountains or aid stations along the route. However, for longer endeavors, it's crucial to carry 1 to 2 liters of water to sustain yourself between potential refilling points. On the other hand, if you're venturing into areas with natural water sources like streams, carrying a filtration system can reduce the amount of water you need to carry initially. A portable filter enables you to purify water on the go, allowing you to stay hydrated without lugging excessive weight.

Selecting the Right Hydration Containers: Reservoirs, Flasks, and Bottles
There are multiple different types of fluid storage containers offered in running vests. Understanding how much water you need to carry as well as your preferred method of drinking water during the run will help you choose the right pack for your needs.
1. Reservoirs: Efficient Hydration Systems
Reservoirs, often referred to as hydration bladders, are a popular choice for their high fluid capacity and ease of sipping while on the move. These flexible, bag-like containers are compatible with a hose and bite valve system, allowing for effortless sipping without interrupting your stride. Reservoirs are particularly advantageous for long-distance activities where consistent hydration is vital. They typically range from 1.5 to 3 liters in capacity, providing ample hydration without the need for frequent refills.
2. Soft Flasks: Compact and Quick Access
Soft flasks are more compact than reservoirs and fit snugly within pockets or compartments on your vest. They are ideal for quick sips of hydration, making them suitable for shorter runs or races. Flasks often come with bite valves or small spouts that allow you to drink without slowing down. While they offer a lower fluid capacity compared to reservoirs, flasks' convenience and lightweight nature make them a preferred choice for many athletes.
3. Bottles: Traditional and Flexible
Bottles are the classic choice for hydration, and many vests come with bottle pockets for easy access. They offer versatility in terms of the types of fluids you can carry, from water to electrolyte drinks. While bottles might require you to briefly stop or slow down to take a drink, their familiarity and ease of cleaning make them a reliable option.