100 cotton thermal underwear:
Product boxes, company logos, tags, barcodes. Some boxes also have an invisible anti-counterfeiting mark, a trademark of the company, on the bottom.
Genuine products are thin, soft, stretchy and soft to the touch.
Pull the collar, sleeves and waistline of the underwear firmly horizontally and vertically. Counterfeit products are generally inelastic and are not easy to return to their original size after being pulled by hand.
It fits snugly and feels comfortable, warm and cold, windproof, breathable and soft.
Genuine products cannot withstand repeated washing of the washing machine without deformation, shrinkage and discoloration.
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