Anyone can recomend some brands of xlr cables which have the best shield?
I need protect my system from interference.
I'm using Zu Audio's latest Event mk2 xlr cables with very good results. Its a TRUE balance design interconnect so they don't tie anything to the shield.. Pure silver single crystal.. Virtually immune to interference.. Ultra wide bandwidth.. Compared to a lot of the other brands, very affordable.. Check it out.. 
I am a cable manufacturer so I won't talk about mine. (Bionic Cables) LOL

System matching is important tonally and resolution wise.  Silver does tend to have a metallic sheen to the high frequencies and when you start getting into the high performance cables there are big differences in sound and staging.

Other brands  that have very good shielding is Cardas, Purist, FMS, Shunyata, and Audioquest. Although some of these might not be a good match sonically.
Make your own with Belden Brilliance 1696A or other AES/EBU grade cable and Neutrik connectors. They’re dead-simple to make. Shield by the way is important, especially so if you are conveying moving coil or moving magnet phono cartridge signal to your phono preamp.