The UC Earth 80mm wheels are made of Eco-friendly corn polyurethane, use natural ink for printing and the core is produced out of 50% recycled plastic. What if your wheels could be reincarnated? Product specialilsts at POWERSLIDE worked for hand in hand with MATTER urethane experts to develop a new concept of inline skating wheels that could help reduce environmental impact. The UC Earth 80mm wheels are made of Eco polyurethane which is 45% corn-based and features a natural milky look that avoids the use of additional color pigments. The reflex hub is made of 100% recycled material. The speed/bullet profile and the 88A hardness complete the specs to make it one of the first eco-friendly wheels.