Sock-like fit adidas Primeknit upper Lace closure Supportive heel counter Boost midsole A run on the boardwalk or picking up trash on the coastline. This version of the adidas Ultraboost Shoes are for people who enjoy the beach but also keep its interests at heart. The soft adidas Primeknit upper offers a mix of support and flex. The Boost outsole offers comfort you'll have to feel to believe.