"There are various energies emitted by the bodies biofield..."
I always am concerned by a sales pitch that doesn't bother to proof read their copy and eliminate misspellings. It speaks of lack of attention to detail. It should be "body's" unless "bodies biofield" is a technical term.
Also, "biofield" doesn't show up in my dictionary. But here's the definition according to red-spirit-energy-healing.com:
The Human Biofield Defined
The human biofield is commonly referred to as the energetic matrix that surrounds and creates the human form. It directly links the cellular activity with the meridian pathways to create the physical form and all other vibratory aspects of the being. This energetic field is like a superhighway that allows the DNA in our cells to communicate faster than light and maintain a coherent holistic intelligence in the organism. This biofield is not particular to humans since all living things posses it. The biofield is commonly referred to as the aura, but this is not strictly accurate as the biofield comprises multiple frequencies and information.
Sounds like hooey to me without having to get any more technical.
Back in the 70s I had a pair of glove liners that I called "space gloves" which were synthetic but incorporated strips of foil. They worked great at reflecting heat back to my hands. I loved them to death and have not seen another pair since. If these things can work like those liners I'm all for them. But the BS marketing is over the top.