1. Many sweaters are made of chemical fiber, so it is best to smell it with your nose when you buy it. If there is no peculiar smell, you can buy it, otherwise it will harm your skin.
2. The elasticity of the sweater is very important. Stretch the surface of the sweater when buying it to check the elasticity. The sweater with poor elasticity is easy to deform after washing.
3. Be sure to open the inside of the sweater to look at the washing instructions, and ask the shopping guide whether it needs dry cleaning, whether it can be exposed to the sun, etc., so that it can be taken care of later.
4. Check all the yarn joints on the surface of the sweater to see if it is smooth, whether the knitting pattern is consistent, and the color of the yarn is well-proportioned. After careful selection, you can buy it with confidence.