I've seen this commercial several times. They make you think this is from britain or something, but it's from telebrands. This company has a LOT of complaints about them, so just a warning.
I dont know what the ring is made out of. I tried to look on the site to even see if it were metal instead of plastic, but no where can you see what this ring is made of, which I think should be required before spending moeny to begin with. Especially since people DO have allergies.
Buy if you want, but you may want to google telebrands complaints, or just search telebrands on this site. They have like a million infomercial products.