Black 2.5mm twisted polyethylene with a breaking strength over 225 lbs Headband is HD vinyl with 320 Ib. tensile strength Bottom and side tapes are HD vinyl on sheath 4 rows of lock-stitching in headband Whether you're hosting a competitive tournament or a recreational game among friends, you can rely on the strength and support of the MacGregor Varsity 300 42 ft. Tennis Net. With high tensile strength and durable vinyl and polyethylene construction, this net will stay strong throughout tough games. Give your team reliable equipment with this net's lock-stitched headband and fiberglass dowels, which keep the net at a consistent height, so your players can focus on sending serves flying.