When it comes to finding sustainable leggings, the equation is complicated because – more than other clothes – leggings need to stretch. They require an immense amount of the elasticity provided by synthetic materials like polyester, nylon and elastane which are all derived from fossil fuels and aren’t great for the planet.
There are some more environmentally friendly plant-based alternatives on the market like bamboo, cotton and hemp. But most of the time these are blended with synthetic materials that make them harder to recycle and compromises their ability to biodegrade.