Where to Buy
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Here's what other sites are saying:
Nathan Running Packs Trail Mix Plus - 20 oz-Black/Safety Yellow 4637NBSY. The Nathan Trail Mix Plus is the best-selling fully-adjustable bounce-free two-flask hydration belt on the market.
The Nathan Trail Mix Plus hydration belt comes equipped with two 10 fl. oz. reflective, insulated flasks to keep your water cool, so you stay hydrated on long training runs or races.