The Nike Space Hippie 03 'Grey Volt' is a part of a collection that focuses on sustainable practices and bold designs. This particular pair showcases a high-cut collar and incorporates the groundbreaking FlyEase technology, allowing for effortless slipping on and a secure fit. To further elevate its eco-friendly credentials, the knit upper of the shoe is crafted using Space Waste Yarn, a material created from recycled plastic water bottles and T-shirts. The midsole of the shoe combines standard foams with Nike Grind rubber, creating the unique Crater Foam technology. Additionally, the shoe features a recycled ZoomX foam midsole, ensuring a comfortable and cushioned stride.