On Via Ferrata you should never use static slings or lanyards as your safety system to progress. Actually, on #viaferrata you should never use anything else than the Via Ferrata Set as your #safetyfirst #climbing item.
There is a dilemma or better though a cause for hazard; the improper usage of the resting system.
On Via Ferrata you need to rest but at times the resting system might be misused and this might expose you to great danger. It is why for progression you should never aid yourself with the resting system other than certain exceptions.
In this video, we discuss one of these exceptions!