Polyurethane (PU) leather, also known as bicast leather or split leather, is a synthetic material made by coating a backing layer of fabric such as polyester or cotton with a flexible polymer and then treating it to look more like animal hide. It is a popular choice for many because it's typically less expensive and more versatile than genuine leather, while still offering a similar aesthetic.

Here are some tips for caring for PU leather:

1. Cleaning: To clean PU leather, use a mild soapy solution (a few drops of mild soap in warm water will suffice) and a soft cloth. Gently wipe the surface without soaking it. Avoid using abrasive cleaners or brushes as they can scratch the surface.

2. Drying: After cleaning, always air dry PU leather. Do not use a heat source like a hairdryer or radiator, as excessive heat can cause the material to crack or warp.

3. Storing: Store your PU leather items in a cool, dry place. Avoid direct sunlight, as prolonged exposure can cause the color to fade and the material to dry out.

4. Avoid Sharp Objects: Be careful around sharp objects as PU leather can be prone to scratching and punctures.

5. Conditioning: To keep your PU leather items looking their best, use a conditioner specifically designed for faux leather. This will keep the material supple and prevent it from drying out and cracking.

Remember that while PU leather may look like genuine leather, it requires its own specific methods of care to maintain its appearance and longevity.