Your fitted sheet is worn out but the flat and pillowcases still new! It's very common that fitted sheet wears out much sooner than flat sheet and that is due to that fact that fitted sheet is subjected to body and feet friction much greater than flat sheet. The combination of bamboo and cotton in the making of the sheets allows for a durable, breathable, and divinely soft feel to the touch sheets. The sateen weave gives these bamboo-cotton blend sheets a silky shine and softness. Possessing ideal temperature regulating properties which makes them the best choice to feel cool in summer and warm in winter. The colors are contemporary, with a new and updated selection of neutral tones. Sizing is generous and our fitted sheets will suit today's thicker mattresses.