VINTAGE MERMAIDS FABRIC BLOCKS are retro vintage mermaids printed on premium fabric blocks with commercial inks which means they don't have to be washed by hand. Hurray! Our fabric blocks are machine washable. I'm sure that for most of you ladies, like myself, time is of the essence, so machine washable is a big plus! We think MACHINE WASHABLE rocks! When your premium fabric blocks need to be washed, the manufacturer's instructions are simple and need to be adhered to. First of all, you will need to wash your premium fabric blocks with a non-phosphate washing detergent. Use liquid not powder. Do not wash a fabric block alone. Wash it with like items in cool water on a delicate setting. After the washing cycle is complete, dry on the lowest heat setting. Iron on the wrong sides with your iron on cotton setting.