X marks extreme on the PUMA RS-X3 Puzzle "Multicolor" Women's Shoe. Exaggerated. Remixed. X³ takes things to a new level: cubed, enhanced, extra. We’ve taken the signature RS design and dialed it up to the third power. With amplified detailing on the upper, stronger material mixes, and bold color combinations, this kick is ready to step into a new dimension and conquer new territories. Running System (RS): PUMA's retro running technology that offers cushioning from the forefoot through the heel.