Review on Ultimate Trail Running Hydration Vest: TRIWONDER Backpack for Marathon - Stay Hydrated on the Go! by Jonathan Wilson

I used the vest to escape into the Grand Canyon. From the south edge, walk to the bridge and jog/walk back. After adjustment, the vest fits snugly and does not slip on the back even when walking downhill. The 2 liter water tank is just right for an Ultratrack. The pockets are convenient for storing some essentials like sweater, headlamp, snacks, electrolytes, keys and cell phone. Straps and zippers keep your valuables safe. The zip pockets on the shoulders surprised me a bit, but they don't bother me at all. Excellent value for money and most importantly - ideal for long-distance runs.