FREEKNOT Winter Clothing Innerwear Y1661 Layer Tech Quilted Undershirt Black

Solfiber absorbs far infrared rays such as sunlight and body heat that penetrate through it and generates heat. The radiant heat creates a heat cycle.
Core-sheath composite fiber technology is used: High-density conductive heat-generating carbon particles are kneaded into the core to ensure semi-permanent performance. It produces high thermal efficiency.
Solar heat generation: 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: Carbon particles absorb body heat (far infrared rays) and radiate far infrared rays to keep the body warm.
Frictionless comfort: Excellent conductivity allows static electricity to escape, preventing fabrics from sticking together and crackling when putting on and taking off clothes. You can maintain comfort.
Quilted fabric for warmth. It creates a layer of air to keep you warm.
Frilling is used on the cuffs and neck. Fits well and looks neat.
The body is made using a circular knitting method to minimize sewing points and improve fit. Highly stretchable and does not restrict movement. [22bo-kan]