1. See the trademark clearly: if it is pure wool, it should have the five contents of the pure wool mark; if it is a blended product, it should have a wool content mark; otherwise, it can be considered a fake.
2. Check the texture: real woolen sweaters have soft texture, elasticity, good hand feel and good warmth retention; fake woolen sweaters have poor texture, elasticity, hand feeling and warmth retention.
3. Burning inspection: real wool contains a lot of protein. Take a few fibers from your clothes and light them. Smell the smell and look at the ashes. If there is the smell of burnt hair, the ashes will be crushed with your fingers and it is pure wool; There is no smell of burnt hair, and the ashes are not crushed or agglomerated. It is a chemical fiber fabric.
4. Conflict static electricity check: Because chemical fiber sweaters must have a lot of static electricity, but woolen sweaters generally do not have static electricity, almost none. Therefore, the sweater randomly conflicts with a lot of static electricity, so it must be a fake and cheap sweater!