Thanks to the elastic upper, the new Nike Air Max 90 Ultra 2. 0 does not need laces at all and therefore guarantees easy slip on and off. Without any laces, the tennis sneaker appears very clean and just fits with every outfit. The story behind the innovation: With the »Ease Challenge«, Nike launched a $ 50,000 design challenge in October 2016 to create a sport shoe that meets the needs of all athletes. Nike's mission is to bring inspiration and innovation to every athlete* (*If you have a body you are an athlete). The Nike Ease Challenge embodies that mission by calling on a larger community of innovators who share Nike's commitment to elevate athletes of all abilities. Physical limitations should be taken into account and athletes of the Paralympics supervised the development process and the selection of the winners' models.