Yamaha OEM WaveRunner&reg; Pro Lanyards with Whistle. Marine-Grade Webbing. Safety Whistle and Clip for Stop-Swtch. MWV-PROLN-YD (Yellow) The WaveRunner Pro Lanyard with Whistle features marine grade webbing with neoprene liner. Very comfortable and it floats for your convenience. Includes wrist strap coiled cord whistle and clip for stop switch. Fits all WaveRunner models (not suitable for Yamaha Boats)