Nike is inviting designers, engineers and innovators to participate in the Nike Ease Challenge, a competition for design ideas that will aid athletes of all abilities. The challenge, with $50,000 as its grand prize, is already open and submissions will be accepted until Dec. 15. The designers of the three best entries will be selected at the end of March 2017. The three finalists will present their designs at the Nike headquarters in Beaverton, Oregon to a panel of Nike leaders, and the winner will be selected in April 2017.