What's your advice, whats are the necessary things what fits in a hip pack to have a safe downwinder?

A leg rope that is securely attached is the bare minimum. Always let someone know when and where you're going

However you carry it:

PFD
Leash
Hydration
Some food (I carry a couple of energy gels and/or a bar product)
Phone in waterproof case (with a full charge)

And make sure you:

Have adequate fitness
Aren't alone (especially if inexperienced) or if going solo make sure someone knows where you're going from, where you expect to finish, and your ETA.
Dress for the conditions (especially in cold waters - better to be a bit too warm than to be cold)

DavidJohn said..

HumanCartoon said..

However you carry it:

PFD
Leash
Hydration
Some food (I carry a couple of energy gels and/or a bar product)
Phone in waterproof case (with a full charge)

And make sure you:

Have adequate fitness
Aren't alone (especially if inexperienced) or if going solo make sure someone knows where you're going from, where you expect to finish, and your ETA.
Dress for the conditions (especially in cold waters - better to be a bit too warm than to be cold)

Good tips there Stu..

I think paddling a yellow board adds even more safety..

Yeah you will need all that stuff DJ if you paddle that yellow board where as on the red board i'm home and showered buy the time you are half way!! LOL