A Portuguese company has been selling ecological shoe soles made from recycled tennis balls. Experienced tennis players use approximately three tennis balls per game or practice session. After, these balls are unsuitable for professional games or training. 300 million tennis balls are produced each year and mostly recycled. However, there has never been an alternative way of recycling these balls until now. ISI Soles studied this problem and after trial and error, the ecological shoe sole made out of tennis balls was developed. Tennis balls are crushed, mixed with cork shavings derived from wine stoppers and thermoplastic.
"Several tests were carried out, with the combination of different materials, in order to achieve a sole that meets all the requirements and chemical and physical properties. A sole that is comfortable, durable and environmentally friendly,” said Vítor Mendes, CEO of ISI Soles.
Environmental concern and sustainability have been at the forefront of ISI Soles' production principles and all operations they carry out. They have a line of Vegan soles which has been PETA-Approved Vegan as well as soles that are biodegradable. These new soles made from recycled tennis balls are just one more innovation that ISI adds to their admirable list.