seacliff
Having now been out with my mask a couple of times, it is horrible. It had a rather useless nose band, I kept steaming up.
I would rather wear a visor, but assume that isn't an acceptable alternative.
I have just read the following Seacliff which answers your question.
PLASTIC visors fail to provide adequate protection from coronavirus infection and should only be worn in combination with a face mask, Swiss authorities have announced
Health officials came to the conclusion after investigating an outbreak at a hotel in the canton of Graübunden. Several staff tested positive and they all wore plastic face shields, while those wearing face masks were unscathed. A guest was also infected
Rudolf Leuthold, head of the Graübunden health department, said: “It has been shown that only those employees who had plastic visors were infected. There was not a single infection among employees with a mask
‘ The visors do not serve as an alternative to hygiene masks They should only be worn with face masks
He told the Swiss newspaper 20 Minuten that the guest “was served by employees with plastic visors.
On Tuesday, the Graübunden health authorities said plastic face shields did not work