Opera-going can be bad for your health. Especially if the composer is Richard Wagner and the opera is five hours long. "Prolonged sitting inhibits venous function, blood pools in the legs and they can swell. Also, the risk of thrombosis may increase, as in a long-haul flight"
So say Medi Gmbh, "one of the world's leading companies in the field of compression stocking supplies" and a sponsor of the Bayreuth Festival.
Those popsocks are a threat to more than good taste.