Hemp Babies diaper doublers work great for overnight! Hemp absorbs slowly but holds much more than micro-fiber making them good for heavy wetters. Two extra layers of hemp adds that extra bit of absorbency you need to make it through the night. These doublers come in two sizes. Small is good for infants up to about 15 pounds and large from 15 pounds to 30 pounds. Made of Hemp Fleece 55% Hemp and 45% certified organic cotton.