For sailboat racing, high tech line that is durable and offers minimal stretch isn't an option, it's a requirement. West Coast Sailing offers a range of high tech line options including Samson Ultra-Lite, Alpha Ropes SSR, Robline Dinghy Control, Marlow Excel Racing, and Robline Coppa 500. These lines have a strong, low stretch Spectra or Dynemma core with a durable cover.