* RaaS: Offering resale-as-a-service for brands like Everlane and Madewell. They helps merchants monetize returns. As e-commerce grows, so will this channel.

Elsewhere, fashion is betting on the impact of circular business models as a way to decouple revenue streams from production and resource use. According to the Ellen McArthur Foundation, clothing production doubled between 2000 and 2015 while during the same period, utilisation of those clothes decreased by 36%.

Thanks to increased consumer consciousness around sustainability, the circular economy, and fair labor, resale has become fashion’s hottest sector—and brands want in. But scaling and making resale profitable isn’t easy, and with increasing competition in the space, it’s only going to get harder.