The Pr1me® Smooth mattress protector has a hypoallergenic and a breathable, smooth fabric surface that sleeps comfortably and will not alter the feel of the mattress. It also features the laboratory-certified H2Pro®liquid-proof membrane which creates a quiet, and breathable barrier against allergens and dust mites and also allows airflow. The universal fit elastic ensures a secure fit for mattress depths of 6"-22". Ultra-thin, smooth surface, breathable, and 100% waterproof.