Hat Attack Harper Fedora Hat in Black. Hat Attack Harper Fedora Hat in Black. 100% wool felt. Spot clean. Silver chain detail. Pinched crown. Brim measures approx 3 in length OS measures approx 21.98 in circumference. HATR-WA258. BAW503RE. Hat Attack became official in 1981 and has been making waves in the fashion world ever since. The high-design affordable accessories line features everything from hats to mittens scarves to clutches. A celebrity favorite, Hat Attack pieces are worn by Kristin Cavallari and featured in major fashion magazines.