Employees can order the shirt, at their own expense, from Tee Luv at tee-luv.com/collections/usps. Employees must enter this passcode when placing orders: usps2019.
The shirt, available in white, sells for $13.99.
Orders will be accepted until Oct. 15 at 11:59 p.m. Eastern time.
Seeking donations or holding raffles or drawings tied to semipostal stamps is not permitted.
In September, employees could order T-shirts to promote the Breast Cancer Research semipostal stamp.
Employees who have questions can email them to Ethics.Help@usps.gov.