When it comes to choosing the best running backpack, the options are endless, depending on your need. If it’s an ultramarathon, you’ll want a lightweight, minimalist pack to carry gels, energy drinks, snacks and waterproofs. If you’re planning to add a run commute or two to your weekly mileage, you’ll want something more substantial in which to lug your laptop and change of clothes. -Zipper main compartment. -Side compression straps. -Inside sleeve for hydration pack. -Front zipper pocket with rain guard. -Reflective logo-Padded mesh back panel. -Exterior stretch mesh pockets and small zipper pockets on hip belt. -17.52 in H x 9.25 in W x 5.12 in D, Weight: 1.08 lbs.