Port Authority Signature Ladies Shadow Stripe Interlock Sport Shirt L459 The superb feel of interlock knit is striking on its own. Add in the subtle glow of jacquard knit shadow stripes and you have one of our most intriguing styles to date. This easy care polo takes a break from the ordinary with modern design. ; 6.2 ounce 58/42 cotton/poly; Traditional relaxed look; Flat knit collar; 3 button placket with pearlized buttons; Open hem sleeves;