To provide a technique for efficiently obtaining far-infrared effect by blending two or more optional far-infrared radiating materials and using them to obtain resonance effect with oscillating wave form having two or more overlapped waves, as a result, by promptly transmitting far-infrared rays having amplified permeability by resonance action into the body of a user and provide a product expressing the resonance effect of the far-infrared rays.

The method for producing the product is to blend an optional natural or synthetic far-infrared radiating powdery material with an adhesive agent or an adhesive material having flexibility after adhesion, adhere the blended material to one surface or both surfaces of a flexible material such as an optional natural fiber, a synthetic chemical fiber, a blended fiber of the natural fiber with the chemical fiber, a fabric or a nonwoven fabric, natural paper, synthetic paper, a synthetic resin, a synthetic resin film or the like, or mix the blended material with the fiber or the raw material constituting the aforesaid material.