For me it was a real discovery that the quality and comfort of sleep depend not only on what kind of pillow I have, its shape, the filling and all that, but also on what pillowcase I put on it. From the latest thing I really liked are cooling pillowcases for summer. At first I didn’t take this cooling idea seriously, because usually it’s all nonsense. But on these pillowcases it’s actually comfortable to sleep even in summer when it’s hot.