Hi Nicolas
I found out .... Kind of puzzle.
First i created my custom field like this
Than filter like this
And I didn't even have to create an hikashop filter module, filters are displayed automatically in the product listing
Also I had to reconfigure my product menus listing and check or uncheck this option :
So it works very good! I'm happy !
Now I want to display them in another position on the left. So I will uncheck option in the product listing. I tried to create filter (with a module creation) but it displays incorrect results.
I'll check module's set up.
Thanks