The Yantra organic wool moisture pad by Sleeptek protects your mattress from accidents using only all organic wool with no synthetics or chemicals of any sort. Works well by itself for small amounts of moisture. For large amounts of moisture, it works best with a cotton mattress pad layered on top. Corner straps keep this pad in place for Twin, Twin XL, Full, Queen, and King and Cal King sizes. Crib size is made without straps. From Sleeptek, one of the first organic mattress manufacturers. Read more about the Sleeptek organic wool.