ZAXY vegan slippers are made of high-quality material that smells like chewing gum. In addition, these shoes are hypoallergenic and 100% recyclable. They do not contain phthalates, the chemical compounds responsible for the elasticity of materials such as rubber and plastic. Zaxy shoes do not contain ingredients of animal origin. When choosing a size, please refer to the size chart. 35/36-22.5/37-23.5/38-24/39-24.5/40-25.5/41/42-26.5cm