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Castle Danger Cooler Daypack

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Frost River Castle Danger Daypack

Castle Danger Insulated Cooler Daypack

One of our most exciting new releases yet, because it comes with the announcement of a new endeavor for Frost River! Meet our new sister business- UllrTec. UllrTec is all about taking your favorite beverage or picnic item on the road and out on the trail. We're mixing Frost River and UllrTec together in our newest Cooler Pack, the Castle Danger Daypack. On the exterior you will find everything Frost River-- reliable waxed canvas, premium leather and solid brass hardware. Upon opening you'll find and Ullr-inspired interior-- water-wicking nylon lining and binding, as well as a removable padded insert to keep your cans and growlers from knocking together on the road less traveled.

Convertible Cooler Pack

Removable back straps allow you to attach this pack to bikes, other packs, and more. Four solid brass d-rings at either side allow for you pack to be easily secured. Spend less time packing and more time adventuring!

Be Cooler.

Be Cooler with Ullr. UllrTec's technology comes to play with the interior design of the Castle Danger Daypack. A removable, padded divider can be configured multiple ways in the main compartment to keep your contents safe and separated.

What's UllrTec?

Check out the UllrTec version of the Castle Danger Daypack (shown on the left side of the image) and learn more about what adventures are ahead for our new brand, here.


Dimensions: 16in H x 10in W x 5in D, Weight: 3.25 lb

Handcrafted by Frost River and Made in USA.

Materials: waxed canvas, leather, solid brass hardware, nylon lining and binding, thinsulate insulation, and cotton webbing. >