We bought these shields to comply with Scottish Covid Guidelines where vocalists must have shields in place in order to perform live. We actually bought 3 different models from suppliers but these were by far the preferred option from the band.
The plus side of these are that they are a good size, not too heavy for our K&M mic stands, they fit neatly onto the boom giving space for keys underneath or tablet holders. It's not an ideal situation having to use these at live gigs, but we found them perfect for what we needed them to do. I would recommend for anyone that needs to put vocal mitigations in place to gig.