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Sure ... he purchased it on Amazon and I believe this is the one.
As mentioned, he wears it for a very short time (per the instructions) to get a feeling of proper posture. Of course it needs to be followed up and sustained by daily practice when not wearing it (& therein lies the challenge)
Same thing happened when my law school clinic went remote. I was skeptical but it really helped!! [link]
I have the upright go but I also bought one off amazon that’s just like a strap. Posture Corrector For Men And Women, Upper Back Brace For Clavicle Support, Adjustable Back Straightener And Providing Pain Relief From Neck, Back & Shoulder, (Universal) [link]
I used something like this. Really helped!