You don't need an arsenal of gear during those longer runs, but it's nice to have some food and water to keep you going hard. The Salomon Agile 2 Set Backpack stores just enough food and water to give you the quick pick-me-up you need to finish strong while staying light on your feet. Easily adjustable EVA shoulder straps provide solid stability and Airvent Agility breathable nylon makes the vest cool and comfortable when you run. The two included bladders provide 2L of hydration, and a zippered external pocket keeps just the essentials secure without adding too much bulk or weight to your stride.