Without a doubt the letter carrier Jac dress short sleeve shirt is one of our most popular items. It can be worn year round with long sleeves under, and can be seen in any post office accross the country. This is the most have staple item for any letter carrier.  We have switched to Flying Cross for all shirts. 
 
Fabric Feature: 65% Polyester/35% Cotton | Weight: 4.2 oz/sq yard poplin weave
Short sleeve collar has top-fused convertible collar
Internal collar stays
Double ply straight yoke
Tagless neck for no scratch comfort
Care: Machine Washable