You may adjust the firmness of this unique latex pillow. It can be made firmer by simply adding a small amount of stuffing through the zippered opening. Likewise, it can be made softer by removing some of the stuffing. These latex pillows are filled with brand new shredded certified 100% natural latex that is hand-stuffed into an organic cotton muslin case. The outer case is a heavy double knit certified organic cotton fabric. These pillows need the extra-heavy fabric so you can't feel the shredded pieces of natural latex inside. To make the outer case we first cut five yards of fabric and machine wash it on hot and tumble dry on hot to remove all the shrink from the fabric. The result is a much heavier outer material that won't shrink if you wash it.