adidas Kakari Z.0 SG Rugby Boots These Kakari Z.0 Rugby Boots by adidas have been engineered with a sleek silhouette with a lightweight, synthetic leather upper which brings enhanced mobility and agility to your game. The boots have an internal strap which delivers a secure, locked in fit and the split outsole flexes to support dynamic runs and quick offloads. The metal studs give you all the traction needed to succeed on soft ground pitches and the adidas branding completes the design.