Carrier exists, so the row sits by carrier, not by claim. Both halves on the row: the shielding physics is confirmed standard engineering; the health claim (that reducing ambient EMF improves health) is unstudied.
Origin & lineage
EMF-shielding materials for rooms/beds.
Claimed mechanism
Conductive shielding attenuates ambient radiofrequency/EM fields in an occupied space; claimed health benefit.
Plausibility
Shielding physics real (standard engineering); the health-benefit claim is unstudied.
Evidence — grade E/F
Both halves on the row: shielding physics confirmed; health claim unstudied. No credible vendor dosimetry located for the health claims; shielding physics needs no vendor source.