Two layers of thirsty 70% Rayon from bamboo / 30% organic cotton give you absorbancy that can't be beat! Fold this approximately 12" x 15" insert into thirds and you get six layers in the soaker zone. Rayon from bamboo is perfect for the heaviest wetter as it retains twice as much moisture as cotton alone for its weight. Plus inserts stay smooth even after many washes, unlike cotton flannel which pills. Bamboo crops are the environmental choice - they require much less water to grow and require virtually no pesticides. And bamboo's antimicrobial properties make it the healthy choice for your baby's bottom.