Your budget, use occasion, purchase motive, etc. should be confirmed at first. Instructions for commercially available products are set forth as follows:
Above are the introduction and analysis for commercially available far infrared sauna products. Here is a simple way to distinguish whether a product has far infrared effect: just check if the manufacturer claims that the far infrared radiating source can be in direct contact with the skin surface of the human body. According to a research, far infrared is easy to shield, and approximately 99% of far infrared can be shielded by a piece of lightproof material with a width of 1 mm.
If the manufacturer claims that the far infrared material is not to be in direct contact with the skin surface of the human body and covered with a cloth cover or an interlayer or other light tight material, the effect of the far infrared must be greatly reduced.
Learn more and make comparisons before purchasing a far infrared product, pay attention to make sure if the far infrared material is practically visible and touchable, and surely purchasing of a best and most suitable far infrared sauna product can be achieved.