Absorbent materials for the snake and boosters are super heavy bamboo fleece and super heavy bamboo hemp fleece (500gsm each layer-some of the heaviest you can buy). The shell has the outer, snazzy fabric with an absorbent layer of heavy bamboo stretch terry layered twice in the wet zone, and soft, cotton velour on the inside. We like our shells to be stretchy to get a better and more comfortable fit. Total GSM for a trim fit newborn starts at 3,430. Petite through Toddler fitteds are 4,700-5,300 depending on the outer material.
Total GSM for our All-night fitteds is 6,000 -6,600. Often the # of layers of absorbency is talked about, but more layers of a thinner, less absorbent fabric is not going to be better than few layers of a heavier more absorbent fabric. GSM is the fabric's weight (grams per square meter) and is a better indicator of absorbency for natural fibers. The heavier the weight, the more the fabric is likely to absorb. As far as speed of absorbency (very important if you have a flooder), cotton is the fastest natural fiber, followed by bamboo and then hemp. However, the amount each material can hold is the opposite, with hemp holding the most, followed by bamboo and then cotton. Our fitteds have cotton velour against baby, followed by bamboo fleece and lastly bamboo hemp fleece in the booster. This makes sure that the fastest absorber is closest to your little one. We aim for maximum absorbency without adding too much bulk.