Our organic futons and toppers are made from natural cotton and wool fiber material. These organic materials get compressed under weight and pressure. To prevent migration of fibers within a futon or topper, our products are made of wool and cotton batts, instead of chunks. To keep your beddings even and ensure its longevity, rotate and flip your futon periodically.The 4 inch Cotton and Wool Fiber Futon is one of Bio Sleep Concepts exemplary all natural products. The futons core consists of 2 inches of cotton surrounded by a 1 inch of premium Eco Valley Wool on all sides which is then protected by a heavy outer shell that features double stitched boxed seams. There is no foam. All Fiber futons can be flipped and sleep the same on both sides. To increase the longevity of your All Fiber futon we recommend airing it out seasonally.Important Reminders:All Bio Sleep Concept futons are designed to be medium-firm.This futon is 100% chemical free and is exempt from fire retardant treatment because of the wool content