Nike Grind Barbell

Innovative new application in balance discs for Nike Grind, the material developed by Nike that sees the recycling of manufacturing scrap, unused manufacturing materials and end-of-life footwear. The various rubber, foam, fibre, leather and textile components are collected, separated and processed into new materials.
The discs for Olympic lifts, powerlifting, bodybuilding, and functional training, are characterised by an xterior layer made with at least 99% Nike Grind rubber.
Each batch is unique as manufacturing scrap colors vary from season to season.

Source and image: nikestrength.comm