FREEKNOT Thermal Innerwear Y5625 Layer Tech Quilted Undertights

SOL FIBER absorbs far infrared rays such as sunlight and body heat that penetrates through it and generates heat. The radiant heat creates a heat cycle. 

By kneading high-density conductive heat-generating carbon particles into the core, performance is ensured semi-permanently. It creates high thermal efficiency. 

The carbon particles kneaded into the core of the thread absorb a wide range of wavelengths of sunlight (infrared, visible light, ultraviolet light). It efficiently converts it into heat and warms the fabric. 

[Keeps warm with your own body heat]
The carbon particles absorb body heat (far infrared rays) and effectively radiate far infrared rays to keep the body warm.

[Frictionless comfort]
By releasing static electricity due to excellent conductivity, it prevents fabrics from sticking together and reduces crackling when putting on and taking off clothes. You can maintain comfort in various wearing situations.