Denier Facts About Stockings and the Principles of Women's Mathematics

Professor Liu's stockings today were only 25D, but because the material was excellent, they offered a certain degree of warmth, not much different from the effect of ordinary 60D winter tights.

D was the unit used to measure the fiber content per unit length in stockings. It was called denier, abbreviated as "D." Generally speaking, summer stockings were around 20D, spring and autumn called for 30–60D, and anything over 60D counted as winter stockings. Most pretty girls who wore short skirts in winter wore stockings above 60D.

There were even ones above 1000D. Those were called long johns.

The times were advancing, technology was developing, and girls' skirts were getting shorter and shorter, just as the D value of their stockings was getting lower and lower. Yet they still possessed warmth and leg-shaping effects comparable to stockings with far higher D values.

The shaping effect of Liu Yuewang's current pair was quite good. Sometimes, she was just a tiny bit envious of the way pretty girls' thighs and calves looked almost the same thickness, and suitable stockings could create a similar effect.

As a result, the stockings above her knees were rather tight, clinging closely to her skin. Just now, Liu Yuewang had felt a tingly electric current dart through her thighs, followed by a little itch. But wearing stockings like these, scratching them did nothing to relieve it.

There was an adult man in the car, so Liu Yuewang was too embarrassed to hike up her skirt and give herself a good scratch. She could only endure it.

Fortunately, the sensation passed in an instant and did not continue to affect Liu Yuewang's driving. She turned on some music and asked Liu Chang'an in the back seat, "Chang'an..."

"Shh..."

Liu Yuewang lowered her voice and continued, "I want to