It's easy to go light—just run naked. If, however, you'd prefer some clothes, water, and food on your next long run, try the Salomon S-Lab Sense Pack Set. It'll keep things light, but the nylon and stretch mesh vest will keep you cool and comfortable, while an assortment of eight pockets will hold two soft flasks, snacks, a layer, and other minimalist essentials. It'll wick moisture away from your skin to keep you comfortable and has a safety whistle and reflective trim to make sure you're easy to find and spot if you wander off course in the middle of the night.