Conventional cotton production has a devastating environmental impact. Thirty percent of the world's pesticides are used to grow it, and enormous quantities of chlorine, toxic dyes and finishing chemicals are used to process it. Choosing organic cotton really makes a difference.
It's important to understand the difference between cotton fiber and cotton fabric. Fibers are strands of material made from cotton, polyester, wool, or silk. Cotton fiber is used extensively in mattresses because it is very cheap to produce. Strands of the fiber trap air, creating loft, which can give a mattress a comfy feeling—at first.
Have you ever sat down on an old futon? Mattresses filled with cotton fiber, organic or not, will harden. They also tend to take body impressions, some severe enough that you may eventually feel as though you're lying in a gully. Cotton fiber also attracts moisture, which causes it to compress or pack down.
Cotton fabric is different. It is made from spun thread, not loose fiber, and it will not compress. The woven fabric is very appropriate for mattress casings and for bedding. It’s soft, breathable and comfortable next to your skin.