1. Strengthen the muscles.
It strengthens the psoas, gluteus muscle, abdominal muscle. It protects the spine and reduces the improper force of the intervertebral disc. It is like wearing a "human natural iron clothes" to prevent and improve the strain of lumbar muscle, lower back pain and sports injuries.

2. Design fit ankle structure – Beautiful posture insoles
3. FIR energy is sufficient to exert rotational and vibrational modes of motion in bonds forming the molecules (including the water molecules) as well as resonate with cellular frequencies. Resulting epidermal temperature is higher when the skin is irradiated with FIR than if similar thermal loads from shorter wavelengths are used.