While Dr. Martens iconic boots have been around for decades, it’s their vegan line of shoes, launched in 2011, that’s making headlines.

CEO Kenny Wilson told the Guardian that sales of the brand’s vegan shoes have grown by “multiple hundreds of percent” in recent years. Thanks to the vegan range, profits at the company rose by 70%, with the vegan line of shoes growing to 4% of Doc Martens’ global footwear sales in the last fiscal year.

Made with synthetic polyurethane plastic rather than animal-based leather, vegan boots, sandals, shoes, wallets, and backpacks currently make up Dr. Marten’s popular vegan line of products.