P.S. from Aeropostale (occasionally known as PS4U) is a chain of clothing stores mainly target children ages 0-15 years old. some P.S. stores are co-branded with the main Aeropostale store in addition to the stand alone P.S. stores that are separate from Aeropostale stores. The first P.S. stores opened in 2009. In 2012 to compete with American Eagle's 77 Kids, P.S. extended the brand to include a line of baby and toddler clothing.