These men's motorcycle - style printed jeans are a great addition to your wardrobe. To wear them, simply zip up the zipper fly and adjust the fit around your waist. When it comes to choosing the right size, remember to check the size chart specific to each item. If you're used to US sizes, you might need to adjust for Asian sizes as described. For maintenance, it's best to wash these denim jeans inside - out in cold water to keep the moustache effect wash looking great. Avoid using harsh detergents that could fade the print. Hang them to dry to prevent shrinkage. With proper care, these slim - fit, full - length straight jeans will last you a long time.