Protect the top and sides of your mattress with the five-sided hypoallergenic waterproof mattress protector. The soft and cozy Tencel jersey blend surface is backed by a special protective layer. This backing features microscopic holes that allow air to move through the fabric while blocking larger molecules like liquids, viruses, bacteria, dust mites, and allergens. Extra-strength bound seams keep liquid out even along the edges. The result is a clean, like-new mattress that lasts.