Port Authority® Non-Iron Twill Shirt TLS638. With the same non-iron finishing treatment as more expensive brands, our non-iron twill shirt helps you keep your sharp looks—at a real value. Crafted from special 40-singles compacted yarn for enhanced softness and comfort,this shirt will keep you professional looking long past five o’clock. 4-ounce, 100% cotton. Open collar with stays. Dyed-to-match buttons. Left chest pocket.