A ReliaMed™ reusable underpad protects a mattress and linens, keeping them dry and clean Each pad has four absorbent layers, forming a thick barrier The soft, quilted polyester top keeps recumbent users comfortable A PVC-coated and waterproof vinyl backing keeps the pad in place, preventing slipping and sliding The Cardinal waterproof underpad is machine washable for easy cleaning and re-use The sides of the pad tuck underneath a mattress for security