Hey Dudes are a brand of shoes that are known for their unique laces. The laces on Hey Dudes shoes are made out of a material called PTFE which is a type of plastic. PTFE is used in many different applications because it is very strong and durable. The laces on Hey Dudes shoes have been tested to withstand over 200 pounds of force, making them some of the strongest laces on the market. The laces on Hey Dudes shoes are also treated with a special coating that makes them resistant to water and stains.