Online Only: 30% Off all ‘47 Brand Boston Bruins Hats. Use Code 47HATTRICK at checkout at the time of purchase. Offer valid online only at BostonProShop.com on October 15, 2019. Discount not valid at the ProShop retail store, on phone purchases, or on charity hats. No minimum purchase necessary in order to activate promotion code. Cannot be applied to previous purchases and is exclusive of sales tax and any additional shipping fees. No cash value. Limit one code per order. Terms are subject to change.