You stick a translucent outsole on the shoes, which looks awesome, but the quality of that rubber – the compound used – probably isn't as great as your average run of the mill solid rubber – which happens to work much better, but doesn't look as… ... But it limits the play-ability of the shoe for those that play outdoors.

What is the most durable outsole material?

PU :: Polyurethane soles are lightweight, resilient, flexible, and have good ground insulation and shock-absorbing properties. These soles have the best durability performance. RUBBER :: Rubber has excellent ground traction and is a non-marking, long-lasting material that enhances the shoe durability and longevity.

What does Nike XDR mean?

Nike's XDR rubber compound (Extra Durable Rubber) has been engineered to provide exceptional durability and traction on a variety of surfaces. As can be seen below in a herringbone pattern, this material has been optimized for tennis players.