Cedar blocks are made of 100% natural aromatic cedar wood without adding any chemicals. Its aromatic oils can refresh your closet and enjoy the natural cedar scent. As well as effectively absorb moisture and odors used to protect your valued clothes.The original scent of cedar wood is light and lasting so you may only smell the scent when put them under your nose but it does not influence the effect. To refresh the cedar, sand it to expose fresh fibers. These fresh fibers have that all-important oil that makes cedar so powerful.