The Covertech mattress protector has three different technologies for a pleasant night’s sleep: BREATHABLE: Covertech has a three-dimensional structure for better air circulation, temperature and moisture control. Sweat produced during the night evaporates immediately with this layer, for incomparable sleep quality. HYGIENIC: Covertech has a waterproof membrane designed to keep the mattress dry in the event of any discharges or incontinence. ANTI-DUST MITE: The mattress protector comprises microcapsules embedded in its weave containing non-active probiotics.. With the friction of the body against the mattress, the microcapsules release these probiotics that become active and thus absorb the dust mite droppings that are responsible for allergies.