At a glance: the color of the product’s packaging box, the company’s trademark, hang tag and barcode. Some packaging boxes also have company trademark invisible anti-counterfeiting marks on the bottom.

Second touch: All authentic products are light, soft, elastic, and feel good.

Three pulls: Pull the collar, sleeves and waist of the underwear to both sides horizontally and vertically. If it is a counterfeit product, it is generally inelastic and will not easily shrink back to its original size after being pulled by hand.

Four wears: Wear close to the body, have good comfort, and can feel the characteristics of warmth and cold protection, wind resistance and breathability, moisture conduction and moisturizing, and gentleness.

Five washes: Authentic product, can withstand repeated washing in the washing machine, does not deform or shrink after being dried in a dehydrator, and remains firm after being dried in the sun.