Mountainsmith

The Sixer 12L Soft Cooler

What Our Gearhead® Experts Are Saying:

"The Sixer nails that perfect balance between portability and insulation. It’s burly enough for day trips, kayak camping, or post-ride beers but light and compact enough to toss over your shoulder. The waterproof liner really works—no soggy car seats, ever."

Built for backyard hangs, road trips, and off-grid picnics, the Mountainsmith Sixer 12L Soft Cooler is our go-to for keeping drinks cold and adventures chill. Its PE foam insulation locks in cold temps far longer than typical soft coolers, while the waterproof PEVA lining and fully sealed seams ensure melted ice stays contained—not dripping in the car or tent.

The Sixer’s barrel-shaped design easily fits six bottles, twelve cans, or even two growlers, making it perfect for small crews and solo missions alike. A removable shoulder strap provides carry comfort from the trailhead to the beach, and the rugged P600D PVC shell resists scuffs and snags from years of use. Whether it’s a park picnic or a paddling trip, this cooler packs serious cooling power in a travel-friendly size.