Both of these Catalina ads for men are from 1956. I kind of love the caption: The man Wears Catalina. And the Double Header part was for reversible swim trunks. "Inspired by Janus the immortal two faced god, our new "Double Header" swim trunks are doubly good looking... give your beach wardrobe twice it's versatility. You can wear them inside out or outside in... they give you two smart swim trunks for the price of one. Double Header provides twice the pleasure of ordinary swim trunks."