Rich in texture, this mat's classic basketweave showcases Chilewich's signature range of colors, in this case a tonal array of dark grey. Each mat is woven of PVC yarns treated with TerraStrand, a proprietary compound that's phthalate-free and contains renewable vegetable compounds that replace petroleum-based plasticizers used to soften yarns. Microban antimicrobial protection shields the rug against bacteria, mold and mildew that cause stains and odors.