The Best Amazon Running Gear to Keep You Motivated and on Track

Liquid I.V. Hydration Multiplier ($23, originally $25)

Mix this Liquid I.V. mix into your water after a long run to restore electrolytes and maintain proper hydration. They conveniently come in single-use packets, and you have several different flavors to choose from. "These hydration powder packets are fantastic for when you're active or out in the heat," one reviewer wrote. "They're incredibly convenient, just mix with water and shake, and you're set."