We currently have MEN’s sizes 8-13 (including half sizes). Our sizes tend to run a little tight, please click THE FIBONACCI FIT for details.

We currently do not see a wide size. We offer a regular / size D width. If you have a wider foot you may want to consider sizing up.

Our shoes are made in Mens sizes, women are welcome to wear them.

Yes! All shoes come with a 30 day limited warranty on manufacturing defects.

Fibonacci Footwear will accept any unworn or unaltered merchandise within 30 days of the original purchase date and reserves the right to deny refunds for a returned item that does not comply with this policy. Please click here to read our FULL RETURN POLICY.

Yes, our shoes have easily removable/replaceable inserts which makes the shoes orthotic compatible.

Yes, we are using a specialty thermo-material that was designed and certified by NASA. More info here: https://www.outlast.com/en/discover-outlast/origins 

No, our shoes are set at an optimized drop of 2mm.

Each pair is packed with quality materials such as full grain leather, custom high performance inserts, thermo-tech temperature regulating material, premium leather lining, suede heel cups, and custom outsoles which are constructed for flexibility and long lasting wear by using high carbon content rubber. We used strobel shoe construction where the upper material is sewn to a fabric bottom creating what is called a sock. The upper and bottom are then joined by a strobel stitch, using a strobel machine. The upper sock is then tightly lasted and cemented to the midsole and then to the outsole.

The VeChain technology allows our customers to authenticate that the product was indeed manufactured by Fibonacci Footwear which reduces counterfeit issues and helps track our product through the supply chain ensuring timing delivery to you. Each pair receives a unique VeChain Smart Tag adhered to the tongue. You can verify your product information by scanning the Smart Tag with any smartphone.