Denim is a sturdy, durable fabric made primarily from cotton. It's characterized by a twill weave, which is a weaving pattern involving diagonal lines. The most common use of denim is in jeans, but it's also used for jackets, shirts, bags, and other clothing and accessories.

Here's how you can take care of denim:

  1. Washing: Denim doesn't need to be washed as often as many other fabrics. In fact, washing denim too frequently can cause it to lose color and degrade in quality. Unless stained, jeans can often be worn several times before washing. When you do need to wash them, use cold water and turn the jeans inside out to protect the color.

  2. Detergent: Use a mild detergent. There are detergents designed specifically for dark colors and denim that can help preserve color.

  3. Drying: Air dry your denim whenever possible. High heat can cause denim to shrink and can degrade the fabric. If you must use a dryer, use the lowest heat setting.

  4. Stains: Treat stains immediately. Soak up as much of the stain as possible, then treat with a stain remover or a mild detergent before washing.

  5. Storage: Store denim in a cool, dry place. Hanging jeans by the belt loops can help them keep their shape.

  6. Ironing: If your jeans get wrinkled, iron them inside out on a low heat setting. Some prefer not to iron jeans at all, and the wrinkles will often fall out after wearing them for a bit.

  7. Professional Cleaning: For high-quality, designer, or raw denim, consider professional cleaning. These types of denim are often made with unique dye processes or fabrics that require special care.

  8. Repairs: If your jeans get a small tear or hole, consider repairing them rather than throwing them out. There are many tutorials online for patching jeans, or you could take them to a professional.

Remember, every piece of denim clothing may come with its own specific set of care instructions on the label, always make sure to check and follow those for the best results.