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Product Description
Kollen is the boot you reach for without checking the weather.
Developed with winter expert Tiril Eckhoff, it’s made for Norwegian winter days that keep changing. Wet. Cold. Slippery. Kollen keeps you warm and dry, and gives you confidence with every step.
The removable shaft adds extra protection when you need it, and can be taken off when you want to wear the boot lower. Just as practical in the city as in the snow.
Comfortable fit with room for thicker socks. Easy to wear. Easy to trust.
Kollen quickly becomes the pair you choose again and again.
Innovations
Nature Lab is our initiative to research, test and develop shoes in a more sustainable way. This shoe uses the following innovations:
#1 – Modularity
At Kastel, we believe one shoe can do more. By designing modular components—like the removable shaft on Kollen—we make shoes that adapt to your needs. Add warmth and coverage when needed. Remove it when you don’t. This is just the beginning of how we’re rethinking footwear to extend use, reduce waste, and keep you comfortable through it all.
Learn more#2 – Size Insert
These shoes come with a size insert, designed to improve fit and reduce returns. Offering half sizes helps, but it also creates stock and production challenges. Instead, we developed a size insert that adjusts the fit by half a size, ensuring a better fit without extra production. If a shoe feels slightly off, this simple solution makes it just right.
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