How about jeans, legs and double thread?

Double-line jeans leg design has advantages and disadvantages.

The double-thread design can make the trouser legs stronger, and the double-thread sewing can make the trousers more durable and can last for a long time. This design is very common in denim tooling style. However, the two-lane line may also have shortcomings, such as rough details, which may not be very popular for some people who prefer exquisite styles.

Generally speaking, the quality of jeans legs depends on personal needs and preferences. If durability and firmness are needed, a two-lane line is a good choice. But if you pay more attention to detail and exquisiteness, a single bicycle line may be more suitable.