We decided to use wool as this is a natural, regenerative, and biodegradable fibre with great functionality. Cotton, hemp, bamboo, linen are just not the best choice for sports right now. The microplastic issue extends further than most people think. The filaments are digested by plankton, such as water fleas and smaller. By doing so, their reproduction is significantly influenced (to the negative). If this part of the food chain in aquatic systems is dying or changing, other marine animals are dying/suffering. Plus, of course larger animals are also eating the plastic. So technically speaking, wearing polyester isn’t the best vegan choice either. Finally, we as humans are having the particles in our body. A responsibly held sheep herd - be it small or huge - does not come with such a tragic impact. Sheep need to be sheared, otherwise they would suffer under their heavy and matted wool dress. Of course, overbreeding animals is an issue and things like mulesing are a definite no go. We make sure to source our yarns only from suppliers with certified sources. We wanted to find a working solution for sports people to stop producing more microplastic right now, not in 5 years.