PUREgrace Twin Mattress Protector (39" x 75") made with All Natural Hypoallergenic TENCEL, Soft and Breathable Waterproof Mattress Pad and Fitted Cover in one <span class="a-text-bold">Botanic and pure fiber</span> derived from eucalyptus trees, found in nature, and grown free from pesticides and herbicides. TENCEL is <span class="a-text-bold">softer than silk, cooler than linen</span>, and possesses perfect moisture management properties. It absorbs 70% more moisture than cotton and then quickly releases it to provide the perfect dry sleeping environment. Ultimately reducing bacteria growth without the addition of chemicals. TENCEL prevents bed bugs naturally. TENCEL is not bleached or dyed, unlike most organic cotton. Our <span class="a-text-bold">baby safe waterproofing</span> is neatly sandwiched between the bottom two layers of fabric. This means no awful plastic crinkling like vinyl protectors, and the product is designed to last by not sticking together or ripping in the dryer, like many others.