What accessory is specifically designed to be made from the same material as the outfit it is worn with?

The self-belt is an accessory designed to be made from the same material as the outfit it is worn with, often serving as a cohesive element that enhances the overall appearance and style of the garment. By using the same fabric, it helps to create a harmonious look that draws attention to the ensemble as a whole, rather than detracting from it. This approach also allows for a tailored and polished finish, which is particularly important in formal or coordinated outfits.

In contrast, while waistcoats, suspenders, and bowties can complement an outfit, they are often made from different materials or patterns that provide contrasting or complementary textures and colors. These accessories may be chosen to add visual interest or to express personal style, but they do not have the specific design purpose of matching the material of the outfit in the way that a self-belt does.