Ear plugs are a cost-effective method of hearing protection in industrial and other loud environments, but their extremely low cost makes them too easy to simply throw away. Using Nike Grind materials to make cheap, recyclable ear plugs reduces waste in any area where high volume sounds are an issue.
Their simplicity makes them easy to manufacture, and they can also be made almost entirely of Grind materials. EVA foam injection scraps will be used for the plugs themselves, while the connecting wire will be made out of a woven mixture of apparel textiles and rubber flashings. Epoxy/glue will be needed to attach the plugs to the wire, but no other non-Grind materials are necessary.