What is double lined?

Double lined refers to an object, usually clothing, that is made with two layers of material. This design is often used to add insulation or to make the fabric more durable. Double lining can also be found in curtains, bags, and some types of shoes, where it serves as a reinforcement against wear and tear. Additionally, some high-end clothing or formal wear may have double lining for a smooth and luxurious appearance. Double lined items may also offer added protection against wind and water, making them ideal for outdoor activities.