Your best paddle leash is actually your hand! Keep control of your paddle. 
For those times when you can't hold on to it, or when you want extra security, a basic paddle leash will do the job.

Safety tips:

• Remember to always carry a safety knife if you use a Paddle Leash
• Not recommended for use in swift water or surf due to the risk of entanglement (stow your leash when coming in through surf)