The sweater itches, which means it's not a pure sweater, but foreign garbage. You can check whether the sweater has a trademark and whether it is produced by a regular manufacturer. If the trademark is in Japanese or Korean, or cut off half directly, it means it is not really made of wool. Here are some ways to tell the difference between a genuine sweater and a fake sweater:

1. read the trademark clearly: if it is pure wool, the pure wool logo should have five contents; If it is a blended product, the wool content should be marked; Otherwise, it can be considered a fake.

2. Check the texture: the real sweater is soft, elastic, feels good and keeps warm; The texture, elasticity, feel and warmth of fake sweaters are very poor.

3. Burning test: Real wool contains a lot of protein. Take some fibers from the clothes and light them. Smell them and look at the ashes. If it smells of burnt feathers, it will crush the ashes with your fingers, which is pure wool; If there is no smell of burnt feathers and the ashes are not crushed and caked, it is a chemical fiber fabric.

4. Friction electrostatic inspection: Rub the clothes to be inspected on the cotton shirt for about 5 minutes, and then quickly separate from each other. If there is no "snapping" sound, it is a real sweater; If there is a "snapping" sound or even an electrostatic spark, it is a chemical fiber fabric, not a fake sweater.