Video poster
Video poster
New ✨Waterproof + Wool Lining

Product Hero

Kollen Modular Winter Boots

Extra warmth when you need it. Less bulk when you don’t.

2 599,00 kr

Cold mornings, wet streets, and sudden snow. Kollen handles it all. Designed with winter expert Tiril Eckhoff, this waterproof boot has a removable shaft for extra warmth and protection. Wear it low or high.

Color: Birch Beige

Size: Choose size
Fits SmallFits True to SizeFits Large

"Super happy with these. This is the 4th pair of shoes I've bought from Kastel and have been happy with all of them, but this shoe stands out at the top. I get compliments on both the design and color and people wonder where I bought these. Very comfortable to walk in!!"

Ingrid H•Verified buyer

Easy returns and exchanges

Secure payments

Free shipping over kr 1200,-

Fast 1-3 day delivery!

Pairs well with

Kollen Norwegian Wool Shaft – Warmth Upgrade

399,00 kr

Kastel Wool Socks Melange Beige

Wool Insole Norwegian Wool

Product Description

Better together. Built for real winter.

Winter doesn’t stay the same all day. That’s why Kollen is built to adapt.

Designed with winter expert Tiril Eckhoff, this waterproof boot combines warm materials, a grippy outsole, and a removable shaft that gives you two levels of protection. On cold, snowy days, wear the shaft for full coverage and warmth. When the weather eases, take it off and use Kollen as a warm, waterproof everyday boot.

Each part is made to support the other. The Merino wool lining keeps your feet dry and comfortable. The outsole gives confident traction when the ground gets slick. And the modular design lets you get more from one pair—more warmth when you need it, less bulk when you don’t.

A boot designed in Norway. Made to make winter simpler, warmer, and easier to handle.

Innovations

Nature Lab is our initiative to research, test and develop shoes in a more sustainable way. This shoe uses the following innovations:

Name:Nature Lab
Goal:Sustainable innovation

#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.

Learn more

Section of blog posts

Frequently asked questions

We recommend