adidas Performance, Issue Type. Undefeated Action Capabilities.’ These are the words that appear printed across a selection of pieces in the latest collaboration between adidas and Los Angeles-based streetwear icons Undefeated. The function-first ideals of the collection are given clout through an all-star line-up of pioneering performance technologies. The XT Boost exemplifies the ideals of the collection combing rugged functionality & pioneering technology.