Generally, silk is supposed to be hand washed and dry-cleaned only. However, this pillowcase is made of silk of the highest quality, so it can be machine-washed. Please note that it’s still silk, and just as other natural fabrics, it needs as much care as you can provide. Here’s how you can care for your silk pillowcase: A pH-neutral liquid detergent and fabric softener are always a must. As a natural fiber, silk should be washed with a solution that is too acidic or alkaline because this kind of solution can harden silk within a single wash. If you can’t identify the pH level of a detergent, then it’s safe to reach for the one that specifies silk. Avoid bleach products at all costs. Water temperature is equally important as a detergent. Anything above 30 degrees Celsius (or 85 degrees Fahrenheit) can damage your silk pillowcase dramatically. If your washing machine doesn’t tell the exact heat setting, then the best way is that set it as cold (or just one level above cold). Drying your silk pillowcase is also important, it’s better to let it air dry. Do not put it in a tumble dryer. Remember that the kinder you treat your silk pillowcase, the longer it’ll keep its quality.