• Get a great workout by utilizing these bands, which give you different results based on their varying thicknesses. • Manufactured out of durable TPE (thermoplastic elastomer). • Bands feature convenient resistance levels stamped onto the TPE. • Each band is 12 inches long when laid flat and can be easily store in the accompanying pouch: great for traveling. NOTE: Product comes with Prop 65 warning label when shipped to California. Label reads: "WARNING: This product may contain carcinogen, which is known to the State of California to cause Cancer and Reproductive Harm. For more information, go to www.P65Warnings.ca.gov.