The sheets are made of up to 100% bamboo fiber on one side. The back side is blended bamboo fiber with high elasticity fiber. They are smooth and soft. Breathable bed sheets will drain away moisture and regulate temperature when you are sleeping. The fitted sheet is 16 inches deep pocket with all around elastic design. It will fit memory foam mattress or traditional mattress. MCO bamboo sheets are easy to clean. They are machine washable in cold water. You can easily clean the bed sheet set from time to time. Twin: 1 x Flat Sheet, 66 x 96 inches 1 x Fitted Sheet, 39 x 75 inches 1 x Pillowcase, 20 x 30 inches Full: 1 x Flat Sheet, 81 x 96 inches 1 x Fitted Sheet, 54 x 75 inches 2 x Pillowcases, 20 x 30 inches Queen: 1 x Flat Sheet, 90 x 102 inches 1 x Fitted Sheet, 60 x 80 inches 2 x Pillowcases, 20 x 30 inches King: 1 x Flat Sheet, 105 x 102 inches 1 x Fitted Sheet, 78 x 80 inches 2 x Pillowcases, 20 x 40 inches