We use this poly/bamboo carbon blend because of its absorbency and comfort against the skin. We have chosen bamboo over cotton as cotton is one of the most intensely sprayed crops in the world, and cotton pesticides are the greatest crop contributor to volatile organic compounds in the environment. Cotton requires wide spacing to grow, allowing bare soil to oxidize in the sun, releasing carbon into the atmosphere, allowing rain to wash soil and chemicals into stream, and decreasing soil fertility. Cotton fabrics, including those made from organic cotton raw material and labeled "organic," commonly go through a series of finishing processes involving synthetic resins, amylase enzyme, Kier boiling, detergents and alkaline solutions, and that's not including bleaches and brighteners used to alter color and caustic soda used in mercerization. Bamboo, on the other hand, takes in five times the volume of greenhouse gasses as an equivalent stand of timber trees and releases 35% more oxygen. It needs no replanting, pesticides or fertilizers, and its roots retain water in the watershed, sustaining riverbanks and reducing water pollution.