I don't see how they could be comfortable and I would hate to crash while using them! USCF and UCI does not allow clipons in mass starts (nor aero bars of any stripe IIRC) but this was kind of a way to skirt the rules.
__________________
“One morning you wake up, the girl is gone, the bikes are gone, all that's left behind is a pair of old tires and a tube of tubular glue, all squeezed out"
Sugar "Kane" Kowalczyk