Global Standards, the body behind GOTS, has launched a new certification covering fibres organic standards never touched, including recycled polyester. Babywear leans cotton, but children's clothing is far more polarised than that, uniform, sportswear and swimwear mean polyester is a huge share of what school-age children actually wear. Until now, none of it had a credible certification to point to.

Children grow out of clothes faster than anything else they own, which makes circular childrenswear the biggest sustainability opportunity in kids' fashion. British organic brand Frugi just won a Drapers award for its circular work. Here is the playbook, and the one move any clothing brand can make first.