Bamboo inserts are perfect for heavy wetters without adding bulk. Combined, the newborn and one size inserts are 7-layers thick. Each layer is 380 GSM, for a total of 2,660 GSM absorbency. The Rumparooz 6R Soaker, designed to compliment the Rumparooz One Size Cloth Pocket Diaper, offers a wide range of size and absorbency customizations, making it versatile for any brand pocket diaper in your stash.