Yes, you can put your Dickies clothing in the wash with your normal load. Any work trousers with reflective sections, velcro fasteners, buttons or zips always turn them inside-out and close all zips and fastenings before washing. This reduces wear on the garment and thereby extends its life, as well as preventing those components from breaking in the wash. If you machine wash your trousers, make sure you do so on a low temperature and gentle spin cycle. Cold water ensures the material of the work trouser does not get damaged or shrink, and the slower spin cycle goes easy on the worn down sections of the trouser, not making them bigger or worse.