ULTRABOOST 5X True Boost UB Popcorn The ultra boost series, known for its distinctive shape, is officially revealed! The new ultra boost 5 features an increased area of Boost material in the midsole, apart from some iconic details. This update presents a 'front Protruding Rear Lift ' streamline design, which translates to a 'front Protruding Rear Lift ' shape. The support plate in the midsole has transformed into a unique 'U' shape, giving the shoe a very dynamic look. The design is a German trainer style, versatile, and football-inspired style, and it remains the original timeless classic.