I use these rags on a daily basis and have for years. As a mechanic in a municipal garage you can imagine how many rags we use. As it turns out it is cheaper for me to buy these rags and throw them away than it is for me to have our laundry service provide rags that are washed. The rags are durable and unbleached and not dyed. So, along with heavy duty wiping and cleaning use, I can also see metal particulates from oiy residue in parts because of the contrast. They do not absorb water very well at all, so if you're looking for something as a drying rag, these are not what you want, however, once wet they do work well for scrubbing with soapy water if that is what you need. I have tried washing them for reuse and they hold up well enough, but at this good price I didn't see the need. Also as a bonus they come in large zip lock type bags that are great for storing all kinds of things like parts and supplies.