Underwear category. The first-class clothing category includes women's wear, men's wear, clothing accessories/belts/hats/scarves and underwear (underwear pantyhose), so underwear socks belong to underwear category. Commodity category refers to the classification of commodities, which refers to the aggregation of commodities within the management scope to meet all or part of the complex needs of commodity production, circulation and consumption activities according to certain management purposes.