New Letter Carrier Shirt Design for the Postal Uniforms Program! These women's mail carrier shirts are made from 65% polyester and 35% cotton blend in a light blue broadcloth without stripes. Women's Letter Carrier short sleeve shirts feature a center pleat placket, two breast patch pockets, hidden pencil compartment in left pocket, topstitched and lined collar, durable press and soil release fabric, and U.S. Postal Service logo patch above the left breast pocket. Order women's postal uniforms by bust size (sizes: 28-44).