Nathan VaporAir Lite 4L

The Nathan VaporAir Lite 4L is a hydration vest with a bladder included, built for runners who want plenty of water and a handful of pockets. Hook and loop Adaptive-Fit panels let you set the fit once and then forget about it.

It suits long runs and trail outings when two flasks will not be enough. Lightweight, breathable mesh and stretch woven fabric keep it comfortable, adjustable sternum straps hold it snug, and reflective hits add visibility in low light. A bladder with a quick-release valve sits in the back, an upper stash pocket takes extra items, and front pockets fit bottles and flasks.

Each size covers a wide range, fine-tuned through the Adaptive-Fit system. Shopping for her? The VaporAiress Lite 4L is the women's version. Running in the dark? The HyperNight QuickStart 2.0 4L wears a reflective geometric print.