The top of the blankets is made from 100% polyester microfiber, while the filling is a blend of 50% TENCEL® (Lyocell) and 50% polyester. Depending on the prevailing conditions, TENCEL® absorbs moisture particularly quickly and releases it again quickly into the environment. Compared to other filling materials for duvets, TENCEL® has the highest moisture absorption. The underside of our blankets consists of the actual functional material: 100% polyester with an Outlast® functional coating. The special coating is NASA-certified and tested in space.