NEW Performance Polo. This is the newest available item in postal uniforms. 
 
Fused convertible collar with internal collar stays
Dyed to match durable buttons
Contemporary 100% Poly Performance fabric – wicking comfort, stay cool and dry
Classic USPS-approved blue shade
Left dress pocket
Professional fit for comfort, mobility and appearance
Plain hem at sleeves and waist
US Postal Eagle logo over left pocket
Made in the USA
Easy home laundering