Aireolux 500TC Sateen Lyocell Cotton Sheet Set White is the highest quality sheets that I have slept on. To start off, the packaging that the sheets come in feels like you are opening a gift and has a beautiful presentation. A thank you note and literature to familiarize yourself with what goes into making Aireolux Sheets. They are so soft to the touch and the stitching is impeccable. The 500 thread count sheets are 100% Lyocell with Temperature Regulating Technology and Moisture Wicking. The greatest part? They are made from Eucalyptus Trees that are renewably grown on biodiverse farms. I have never had sheets that have made me this happy sleeping in the night. You can tell that these sheets last a long time. I cannot imagine using anything else!