The Buttons natural bamboo/cotton nighttime doublers have 5 absorbent layers of 70% bamboo & 30% organic cotton for extra absorbency. They work as a doubler when snapped underneath Buttons daytime inserts. Buttons diaper inserts snap right into our diapers covers to avoid shifting. Your Bamboo inserts may seem large at first but they will shrink after being washed. Bamboo/cotton inserts come in all 3 sizes for your growing baby:

- Small inserts fit babies from 7-15 lbs (inserts are about 11" in length after washing/drying)

- Large inserts fit babies from 15-25 lbs (inserts are about 13" in length after washing/drying)

- X-Large inserts fit babies from 25-40 lbs (inserts are about 15" in length after washing/drying)