Adidas has sold 1 million pairs of sneakers made from ocean trash

Adidas’ sustainable footwear initiative is growing legs.

The company revealed in March that is has made and sold more than one million pairs of its shoes made from ocean plastic. These shoes use a yarn developed by Parley that turns the ocean plastic into a polymer that can used to construct knitted footwear.

Looking at the shoes, they are nearly indistinguishable from a normal pair of Adidas shoes, but the hidden benefits of how they’re made could have lasting implications on the future of footwear.

One million pairs of shoes is obviously not very many compared to the millions and millions the company sells on a yearly basis, and the company has been selling the Parley partnership shoes for almost two years now. Still, one million is not a small number, and indicates that the demand is material.

Read more: Sneakers made from ocean trash