TPU is a type of plastic that is light but durable. And it can be reshaped when heated, which means it's well suited for manufacturing. But how does a shoe turn into a ski boot? Here's how it works.

We tested how well the covers work on multiple shoe types and how well they keep out rain, mud, and snow. More from Entertainment These portable shoe covers from Seal Outdoors turn any shoe into a ...

Whether you’re headed to the slopes and need a chic apres ski shoe or want an extra layer of cosiness back in the city... The Standard's journalism is supported by our readers. When you purchase ...