We’re partnering up with Peter Attia once again! This time for a limited run of our best-selling HYDRO A-Game to honor his best-selling book, Outlive: The Science and Art of Longevity . This hat commemorates Peter’s mission to help people optimize their health and live longer, healthier lives. And we know in turn that means one thing, a life filled with more fun and a hat that will last a lifetime. To read about melin x Peter Attia, click here .