As we get closer and closer to cooler weather, 45NRTH’s boots seem to be steadily getting warmer. First the Japanther, then the redesigned Wölvhammer, and now? Now we dip into the extreme temperature range with the all-new Wølfgar fat biking double boot.

Let’s face it. Much of the general cycling population will never see the temperatures this boot is meant for, let alone consider riding in them. However, for those that consider-25°F to be a warm front for their winter activities, the Wølfgar could be just the answer for their fat biking adventures…

45NRTH calls the Wølfgar a double boot, and it’s easy to see why. The outer boot is meant to protect the foot directly from the elements while also allowing for easy pedaling and walking, while the inner boot adds even more warmth to allow for a temperature rating of -25°F to 0°F (-31 to -12°C). To get there, the removable inner boot is constructed from 4 mm wool felt with polyurethane overlays for durability and abrasion resistance in key spots. The rear of the inner boot is covered in Velcro which mates to the inside of the outer boot to help keep it in place and aid in pedaling.

The real secret sauce though, Is the addition of aerogel insulation under the foot and over the toe. First introduced to 45NRTH Products with the Sturmfist heavy duty glove, aerogel is able to provide its insulating property without loft which makes it the perfect material when thin insulation is needed. The strategic locations will help keep your toes and the bottoms of your feet warm. Also because the inner boot is removable, on big expeditions you can use two pairs to swap in and out once one of the liners gets wet or cold.

On the outside, the outer boot uses a waterproof/ breathable membrane along with a lightweight polyurethane and 1680 denier Cordura shell that is all wrapped around 400g Primaloft insulation for even more warmth. The Wølfgar uses a double lace closure over a gusseted tongue with additional holding power provided by a simpler power strap around the ankle. In case you’re wondering, the custom eyelets are made from Dupont Zytel nylon which is said to be impact resistant even in -25°F. Between the shell the proprietary outsole you’ll find a carbon midsole and heel which is used to reduce weight while making the boot more pedal efficient and offering low thermal conductivity. Up Front is a rubber toe cap that wraps around the aerogel insulation and offers an attachment point for the gaiter hook.

Using a proprietary vibram rubber outsole, the Wølfgar is compatible with two bolt SPD cleats. Due to the intended use of the Wølfgar, 45NRTH chose to make the outsole stud-able with 6 front and 3 rear of their own concave studs. The company also claims the outsole is 20% wider to accommodate the extra insulation but it is still designed to easily clear Fat bike cranks.

Available in sizes 38 through 50 (again no 49), Wølfgar Boots will sell for $450. Look for these to hit dealers in December.

45NRTH WØLFGAR from 45NRTH on Vimeo.

45nrth.com