Naturally breathable with a cotton filling and quilted outer layer for comfort and softness. More Sustainably Sourced We always strive to obtain raw materials from more sustainable sources. This product supports cotton farmers who use water efficiently, care for the environment and promote fair and decent work. Please note:This product features a zip to enclose your pillow. Good to know As a natural fibre, cotton will shrink when laundered, so this product has been specifically designed so that its dimensions take shrinkage into account. To keep the movement to a minimum, we recommend ironing this protector on a warm temperature setting. This will further ensure that it retains its shape.