The short sleeve button-down is still the most common shirt you'll see on a route, and this is the one most carriers end up with two or three of in their locker. 65/35 poly-cotton poplin at 4.2 oz — light enough to wear comfortably through summer, wrinkle-resistant enough to not look like you slept in it by the end of a split shift.
 
Two things most carriers notice right away: the hidden pencil slot in the left chest pocket (it's there, tucked inside the main pocket — useful for a pen or stylus without bulging the front) and the extra-long tail that actually stays tucked when you're bending, reaching, or sorting.
 
Details worth knowing:
 
• 65% polyester / 35% cotton poplin, 4.2 oz — light, wrinkle-resistant
• Top-fused banded dress collar, fully lined front placket
• Left chest pocket with hidden interior pencil slot
• Extra-long tails — stays tucked through a full shift
• Embroidered eyelets for nameplate attachment
• Postal blue with grey stripe — regulation USPS coloring
• Union-made in the USA
• Machine wash warm, tumble dry
Fit: True to size. If you're right on the fence between neck sizes and you want a little room in the collar after a full day, go up a half size. The banded collar runs slightly snug compared to a traditional spread collar.
 
USPS compliant. Uniform allowance eligible. Most popular shirt in the lineup.