These men's jogger sweatpants are a great addition to your wardrobe. To wear them, just slip them on like you would any other pants. They have an elastic waist, so they'll fit comfortably. When choosing a size, make sure to check the size chart as different suppliers may have different measurements. If it's an Asian size, it's better to go a size up. As for maintenance, these pants can usually be machine - washed on a gentle cycle. Use mild detergent and avoid using bleach as it may damage the fabric. Hang them to dry to keep their shape. These pants are made of a blend of polyester, spandex, and viscose, which gives them a good stretch and durability, making them suitable for daily wear on the streets.