Fits mattresses with a thickness up to 10" since the fitted sheet has elastic edging. IKEA of Sweden No optical brightener has been used. 100% renewable material. Non-chlorine bleach. Includes: 1 Full flat sheet, 1 Full fitted sheet and 2 Queen pillowcases. 144 thread count. Thread count indicates the number of threads per square inch of fabric. The higher the thread count the more densely woven the fabric. Machine wash ,hot 140°F (60°C). Do not bleach. Tumble dry, normal. Iron, high temperature. Do not dryclean. 100 % cotton.