D number represents the thickness of stockings. The concept of D, denier (abbreviated as Dan): refers to the size unit of sock fiber, which can be simply understood as thickness. Actually, d is a unit of weight.

The thickness of silk stockings is determined by the thickness of silk fibers, and the unit for measuring silk fibers is denier, D for short. How many grams of fiber weighs per 9000 meters is called less Dan. The smaller the denier, the finer the filament, and of course the finer the stockings are woven. The higher the D value, the thicker and more durable the stockings are. On the contrary, the smaller the D number, the thinner the stockings, and the less durable they are.

D quantity and temperature:

3D-5D is an ultra-thin invisible stocking, which seems to be worn on the body. The even skin color of the legs is more mysterious with the subtle changes in the color of the stockings.

8D- 15D are ultra-thin stockings, suitable for temperatures above 25 degrees.

20D-40D are thin stockings, suitable for 18 ~ 25 degrees.

50D-80D are micro-permeable stockings, suitable for 15 ~ 22 degrees.

100D-680D is waterproof stockings, suitable for 10 ~ 20 degrees.

800D-2800D is a medium-thick silk stocking, suitable for temperatures ranging from 8 degrees to 15 degrees.

3000D-5000D is thick pantyhose, suitable for temperature of 5 ~ 12 degrees.

Extra-thick cold-proof pantyhose over 5800D are suitable for 3 ~ 10 degrees.

Everyone has different cold tolerance, and the temperature difference between north and south in the morning and evening is also different. The above data are for reference only.