Men's ADIDASA(R) ULTRA BOOST LACELESS :: Slip into your no-strings-attached Men's adidas Ultra Boost Laceless as easily as you'd slide on a sock. This highly-responsive kick is as futuristic as it looks, with a foot-hugging Primeknit upper that moves in harmony with your footstrike and adapts to your stride. The more you give, the more you get as you maximize energy return from every step with a boost(TM) assist, the most responsive adidas cushioning ever!