The ST7 Perfection Thermos is Baden's top-of-the-line match ball construction. The ST7 receives Baden's "Perfection" brand in recognition that every component of this ball is selected to be superior. It's thermal-bonded surface prevents unplayable, heavy waterlogged soccer balls and creates consistency and durability that lasts. Say goodbye to constantly pumping up your soccer ball- the Perfection Thermos has a butyl bladder that allows for a lively response off the foot and provides long-lasting air retention. The Perfection Thermos also has a cushioned, textured surface made for an excellent striking surface and true flight. At Baden we are honoring our athletes with a superior ball to match their superior play, so their only focus is the game, rather than the quality of the ball.