18/09/2026
Recycled polyester or organic cotton. Neither one is the sustainable choice.
Cotton drinks water. Polyester barely does. Polyester sheds plastic microfibres in every wash. Cotton does not.
Most recycled polyester comes from drinks bottles, which means it leaves a working bottle-to-bottle loop and enters a garment that has nowhere good to go afterwards. And polyester lasts longer, which matters more than the rest, because a garment worn twice as long halves everything about it.
Four dimensions, no winner. Whichever you pick, you are choosing which problem you are willing to own.
The honest position is to say which trade you made and why. Brands get into trouble not by choosing a fibre but by claiming the choice was free.
I’m Filipe. Brands call me when their Portugal production goes wrong.