My kid finished at Tilden in 2020, so it's been a few years, but she owned a Tilden PE shirt and shorts and mixed with other athletic wear. They definitely changed before and after class, and I tried to have mine bring home clothes each weekend to wash. Having only one uniform wasn't a problem since she wore other clothes as well, it didn't necessarily have to be back at school Monday morning. She wore the shirt more than the shorts, they were more old-fashion.