Handmade from 100% natural rubber with a cotton lining. Free from harmful chemicals like phthalate, PAH. This waterproof material regulates temperature and is a natural sweat-absorbing material that keeps feet dry. Natural rubber is a plant material and, under certain conditions, insoluble particles could rise to its surface. As with leather, small imperfections are the hallmark of natural materials. Color: White No offers or bids: all items are already at max discount Final Sale No Returns or Exchanges!