In 1989, a trained EMT and competitive cycler named Michael Eidson created a makeshift hydration system using an IV bag filled with water, a tube sock and a clothes pin. Several months later, he began ...
We independently review everything we recommend. When you buy through our links, we may earn a commission. Learn more› By Jenni Gritters A hydration pack—that is, a backpack with a built-in water ...
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