Nathan Soft Flask with ExoSpine Hydration Flask Size:OS Lightweight construction works as a

Lightweight construction works as a standalone piece or a mid-layer under a shell or jacket

Layer it over a dress or tee to complete the (more socially acceptable

When the temperature drops on a morning hunt or a cold-weather trail push

the Evolution Box NSE is our pick for guys who want a casual tee that actually holds up

Blue/Yellow

Nathan Soft Flask with ExoSpine Hydration Flask Size:OS Lightweight construction works as aFor runners who need clean, reliable hydration on long efforts or race day, the Soft Flask with ExoSpine is our pick for vest based hydration setups. ExoSpine ribbing keeps the flask from collapsing as it empties, so you get consistent flow without fighting the squeeze. Rolls up tight when dry, so you're not hauling dead weight late in a run. ExoSpine ribbing prevents mid squeeze collapse, giving you consistent, easy flow even when the flask is