Premium Double Brushed Microfiber – JSD microfiber sheet sets are made from 100 GSM microfiber, more durable and softer. GSM is a measure of density, similar to thread count. Usually the GSM of microfiber falls between 55 and 120. The higher the GSM, the more fibers in the sheet and more stronger your bed sheets will be.18 Extra Deep Pocket Fitted Sheet – Extra-deep fitted sheets are for mattresses 16 to 22 inches high. If you are struggling with securing your bed sheet under the mattress, thicker than 14 inches or you have a mattress topper, then our extra deep pocket sheets are great choice !Exquisite Details – All-around elastic on 18 fitted sheet allows for snug, secure it stay on your bed well. Envelope closure pillowcases with delicate embroidery.What Includes – twin size sheets set (1*fitted sheet 1* flat sheet 1*envelope closure pillowcase) ; full/queen/king/cal-king sheets set (1*fitted sheet 1*flat sheet 2* embroidered envelope pillowcase)Easy Care and Maintenance – Different from cotton, bamboo or other fabrics, microfiber sheets resist pilling, wrinkles and fade, more durable at affordable price, better yet, easy care, machine washable in cold, dries quick on tumble dry low.