A good Paddle Leash will save you in the event you happen to loose your paddle overboard.
They easily attach to your kayak or boat and then to your paddle and let you easily get your paddle back.
Don’t think it stops with paddles though. Use it for your landing net, fishing rod, dry bag or any other item that may go overboard.
A good paddle leash is a cheap way to know your gear stays on board or can be retrieved with you getting wet.