Holy Lamb Organics Moisture Barrier/Puddle Pad is a mattress protector from everyday wear and tear. Made with slightly felted and tightly woven wool that is naturally water-resistant. The napped surface absorbs moisture and keeps dampness from getting through. Weather sweating or children who sometimes go in the night, the Puddle Pad keeps you covered. Made with thick, felted 100% woven organic wool textile. It lays flat on top of the mattress without straps and is held in place by fitted sheets. This a natural alternative to vinyl plastics or synthetic mattress covers.