This set of temperature-regulating sheets is well made, and a nice addition to your bedroom accessories. The sheets are made with Lyocell (Lyocell is a semi-synthetic fiber made from wood pulp that is biodegradable, breathable, and durable) and cotton. The nice property of Lyocell is that it whisks away moisture -- so you will feel cooler in warm weather, but you also feel warm in cool weather. The fabric is also smooth and soft -- so it is gentle on your your skin (which feels caressed when you are enveloped within). With the 16" tailored deep side panels, the fitted sheet will work with today's deep-sided mattresses; and the set is machine washable and dryable (best to use cooler water and a cooler dry cycle). If you want to pamper yourself, give this sheet set a try. You be very comfortable and thank yourself for making the purchase.