Nathan Pinnacle 18oz Insulated Soft Flask Size:OS Merino wool construction delivers natural

Merino wool construction delivers natural warmth-to-weight ratio without the itch of synthetic fleece

so spills and light snow won't end the adventure

Bag more peaks in durable

Built for cold-weather output — trail runs

Durable rubber outsole built to handle pavement and everyday mixed terrain

Nathan Pinnacle 18oz Insulated Soft Flask Size:OS Merino wool construction delivers naturalBuilt for runners and hikers who carry their hydration in hand, the Pinnacle 18oz is our pick for hot weather efforts where a cold sip actually matters. ExoSpine technology keeps the flask from collapsing in your grip, while double wall insulation holds fluid temps longer than a standard soft flask. The mesh strap and built in pocket round out a clean, no fuss carry. 18oz (535mL) capacity with double wall insulation keeps fluids noticeably cooler