HARDEN VOL. 4 The Harden Vol. 4 is new for Basketball on adidas.com. Scroll through the pictures above to see more details from different angles. If you’ve tried out the Harden Vol. 4 before, leave a review below to let us know what you thought. We’re still working on getting you more information about the Harden Vol. 4 on adidas.com so come back soon. In the meantime, here’s the product article number FV4227 for your reference, it's categorized as: Basketball Athletic & Sneakers