The first question is "what is the difference between underwear-grade cotton yarn and ordinary cotton yarn?"
First of all, the underwear-grade cotton yarn contains almost no impurities. It has been carded more than 12 times than ordinary cotton yarn. it looks extra pure after emoved some thicker, uneven, and even the broken cotton yarn.
Then the cotton yarn of underwear grade is very uniform in color, especially in black. The top grade black cotton yarn is shiny, the ordinary black cotton yarn will show a little gray, almost no gloss.
In addition, underwear-grade cotton yarn is not easy to decolor, because the higher purity cotton yarn has better control over the color.
The characteristics of top-grade cotton yarn is very soft which consumers easily to feel. It is much softer than ordinary cotton yarn. The degree of softness is difficult to express with a data. My personal feeling is that it can be more than 30% softer. If you touch the thigh-high socks with ordinary version and underwear-grade cotton yarn at the same time, you can immediately determine which one is better, but it is difficult to identify with the naked eye.
Kayhoma thigh high socks are all woven with underwear-grade cotton yarn, so they are particularly soft. The skin of the thighs is sensitive, they need to be protected, and the underwear-grade cotton material is more friendly to the thighs. Kayhoma thigh high socks are also more uniform in color, and they may become the focus with your thighs in the sunlight.