

Sateen weave is a type of cotton weave, which is one thread over and three threads under. This is different from the percale cotton weave – the traditional one thread over and one thread under. These additional threads make sateen slightly warmer on the skin, so it's great for cooler sleepers.
Lyocell is similar to viscose in that it is a regenerated cellulose fabric, but is made with a more eco-friendly process. TheU.S. Federal Trade Commissiondefines lyocell as rayons “composed of cellulose precipitated from an organic solution in which no substitution of the hydroxyl groups takes place and no chemical intermediates are formed” — essentially meaning it does not use the harmful chemical solvents normal viscoses use. Lyocell production also results in little waste product, but it is still relatively energy intensive.