1、Check the size, shape and feel Check the wool yarn for thick knots and excessive knots, bad stitching, extra threads, holes, gaps, defects and oil stains, etc. 2、Check the elasticity of the ribbing at the cuff and hem Can be propped up by hand cuffs or hem, and then relaxed to see if it can be well recovered. At the same time, it should be noted that the cuff or hem ribbing contraction force should not be too large, otherwise there will be a sense of tightness in wearing. 3、Check the quality of stitching Special attention should be paid to the sewing quality of the sleeve opening, front and back neckline, shoulder seam, side seam and other combined parts. When checking, hold both sides of the part to be checked with your hands and pull slightly harder so that the seams can be clearly shown in front of you. 4、Check the workmanship When choosing a pullover wool sweater, pay extra attention to whether the elasticity of the collar is appropriate, whether there are any leaking stitches at the opening of the jacket, whether the color of the jacket thread is correct, and whether the threads are cleaned up. When choosing cardigans, pay attention to whether the color of the front cardigan is correct, whether there is any needle leakage, whether the needle and button line is loose, the quality of the button eye, and the cooperation between the button and the button eye should also be noted. 5、Size up The shrinkage rate of wool sweaters varies greatly due to the raw materials used and the structure of the knitting, so you must understand the shrinkage rate when shopping and use it as a basis to consider the size of your purchase.