I've been purchasing from Earthing
I've been purchasing from Earthing since first reading the Earthing book many years ago (when the sheet had to be placed on top of the bed. I've had pillowcases, and most recently an under the sheet pad. Im currently using the mat as a multi use item; during asanas by day and at the foot of the bed by night. Stick with the one who did the peer reviewed study- (that would make an excellent t-shirt).