These men's classic plaid patterned slim formal trousers are a great addition to your wardrobe. To use them, simply put them on like you would any other pair of trousers. When choosing a size, remember to check the size chart carefully as different suppliers and brands may have their own sizing. For a good fit, if you usually wear size S in US sizes, go for size L in Asian sizes. To keep them in good condition, follow the care instructions on the label. Generally, you can machine - wash them in cold water with similar colors and tumble dry on low heat. Avoid using harsh detergents or bleach as they may damage the fabric. With proper care, these trousers will last you a long time and always look sharp for formal occasions.