Leashes! We go on about them a bit but that's only cause they're SO important. Such a crucial piece of your safety kit, possibly even THE most crucial.
Having a leash is essential, but also the right type of leash for the job is just as important. Use the wrong leash and it could end up being detrimental to your safety.
The type of leash you use will depend highly on the environment that you will be paddling in and what kind of paddling you're up too.