All of our sheet sets are machine washable. We recommend washing your sheets in cold water on a gentle cycle. Tumble dry low, and remove from the dryer as soon as possible to keep them from wrinkling. Warm iron as needed. To keep your sheets looking good as new, use a non-chlorine, oxygen bleach with each wash and wash them every one to two weeks. "When it comes to bedding, invest in the best sheets you can afford," she told us. "With regard to fabric, opt for a high-quality option that will stand the test of machine washing. Darice Bulk Buy DIY Foamies Extra Thick Foam Sheet White 6mm Thick 9 x 12 inches (10-Pack) 1199-20. 4.1 out of 5 stars 26. $11.30 $ 11. 30. Get it as soon as Fri, Sep 20.