Apr 16, 2018. So we've picked the best hydration running packs to help you do both. Nathan VaporAir Men's Hydration Backpack (from US$ 83.95). And for female runners, Nathan also offers the women's-specific VaporAiress, designed. Built for fast-moving pursuits—our trail running packs and vests thrive on single- tracks, ultras and wild trails. Free Shipping over $75 at Patagonia.com. A lightweight running backpack is essential for running to and from work….