The adidas UltraBoost 4.0 “Triple Black Nubuck Cage” is a premium edition of the popular all-black running shoe. The high performance runner once again goes for the “Triple Black” color scheme, but this time gets upgraded with a nubuck leather cage to complement a black Primeknit upper that is speckled with dark grey thread. Other details include a textured matte finish on the heel counter, and a small hit of dark red on the Torsion bar seen within the sole. The adidas UltraBoost 4.0 “Triple Black Nubuck Cage” released in December 2018. The adidas UltraBoost 4.0 “Triple Black Nubuck Cage” is a premium edition of the popular all-black running shoe. The high performance runner once again goes for the “Triple Black” color scheme, but this time gets upgraded with a nubuck leather cage to complement a black Primeknit upper that is speckled with dark grey thread. Other details include a textured matte finish on the heel counter, and a small hit of dark red on the Torsion bar seen within the sole. The adidas UltraBoost 4.0 “Triple Black Nubuck Cage” released in December 2018.