These Organic cotton bamboo blend quilted pads are so soft and luxurious. Firstly, the material feels like the softest sweatshirt you can imagine! Antibacterial and antimicrobial properties come from the bamboo! 70% Organically grown bamboo 30% Organic cotton blend! Sizes are as follows: The Ultra light is 8 inches long and consists of 2 layers of bamboo organic cotton. The light is 8 inches long and consists of 2 outer layers of bamboo organic cotton blend and an additional one layer inside of the bamboo organic cotton fleece. The medium flow is about 9 inches long and consists of 2 layers of bamboo organic cotton blend fleece with two layers of heavy 70%bamboo/ 30% Organic Cotton blend fleece tucked inside. The heavy flow is 10 inches long and consists of the bamboo organic cotton blend fleece and has 3 layers of heavy 70%bamboo/ 30%Organic Cotton fleece inside. Waterproof of this variety is available for purchase on other listings! The quilting on these pads make them so different feeling from anything else, they feel just amazing! I use nothing but these pads! Wash and use instructions included with every feminine care purchase. These are hand made in the USA by myself in a smoke free environment!!! Save $5.00 on the full set of 3 of each pad. Thank you very much for viewing my products. *Do not hesitate to ask for waterproof options. I make pads with both Waterproof PUL(Polyurethane Laminate) AND Water resistant Anti-Pill FLEECE BACKINGS. WHATEVER YOU PREFER. >>>Please keep in mind that PUL is thinner but it does need to be air dried or you many experience your pads de-laminating at some point in the life of the pad if a PUL pad is dried in the dryer. >>Fleece can be thrown into your washer AND dryer but it is thicker than the PUL. >>>>***Orders over $50 get a free pantyliner.***>>>***Orders over $100 get a free 3 pack of pantyliners.***>>>Pantyliner will be either cotton, organic cotton or bamboo, whatever I have on hand at the time but ALWAYS natural fibers!!!