This Pillow is covered in ‘Cleansleep’ fabric, which enables the product to be both waterproof and anti-bacterial.(Also flame retardant) An added feature is the “Mardel Valve”, which enables the pillow to breathe and ensure patient comfort.
A "Mardel Valve" is a feature, likely on a medical pillow, that allows it to "breathe" and ensure patient comfort, as it is described as enabling the pillow to be waterproof and anti-bacterial.