Microfiber: I wash these in my washer on gentle, with cold water, and microfiber safe shampoo (i.e. DI Micro-Restore). I then let them air dry. If you need to dry them in the dryer, make sure the lint trap is very clean and dry them on super low heat, or just a tumble non heat setting. Any high heat will harm the towels. Once finished I use a large zip lock bag (https://www.detailedimage.com/DI-Accessories-M12/Reclosable-Storage-Bag-P510/24-x-24-S1/) for storage. You can take it a step further and place them in a draw or cabinet after packing them away in a zip lock for added protection from dust.