When buying any kind of textile product, it is recommendable to look for products with ecological certification or which carry some kind of stamp which guarantees that it is respectful to the environment.
“Made in Green” symbol created by AITEX (Asociación de Investigación de la Industria Textil)
“Oeko-Tex Standard 100” symbol is a European badge which guarantees the absence of harmful substances in textile products during their elaboration.