New Letter Carrier Shirt Design! USPS letter carrier shirts are made from 65% polyester and 35% cotton blend in a light blue broadcloth without stripes. These Postal Shirt-Jacs feature five button placket front, left breast patch pocket with hidden pencil compartment, two lower patch pockets with mock pocket flaps, bottom side seams with V-notch opening, and the U.S. Postal Service logo over the left breast pocket. Available in Tall Sizes: M-2XL.