Stay cool and dry on the job while supporting your local Police and Law Enforcement Officials in Rothco's Thin Blue Line Moisture Wicking Polo. Constructed of a moisture wicking polyester material, the polo shirt will keep the body dry and comfortable in the most heated situations. The moisture wicking polo is a full-size cut with a classic 3 button front with the Thin Blue Line Flag embroidered on the left chest. Thin Blue Line Moisture Wicking Polo