Our two lightest and fluffiest pillow fills, side by side. But which do you choose? Kapok (on the right) is a plant fiber and woolly bolas (on the left) is an animal product. Kapok carries the most fluffing ability, comparable to a feather pillow if you understuff the kapok. Its light, airy fiber will certainly be a float away fiber but does lose its loft as it is slept on. The bolas are the more cloud like fill. If fluffed every night, they maintain a springy feel that doesn’t deflate as slept on. Both fibers overstuff well, kapok producing a solid, firm pillow and bolas, a springy, firm feel.