Using these pillow covers is a breeze. Just unzip the cover and insert your pillow. They're perfect for sprucing up your indoor living room or outdoor patio. When it comes to cleaning, a gentle machine wash in cold water with mild detergent is recommended. Then, tumble dry on low. Avoid using bleach or harsh chemicals as they can damage the UV protection of the polyester. Since these pillow covers are water and UV resistant, they can handle outdoor conditions well. But if there's a long - term exposure to extreme weather, it's best to bring them inside to prolong their lifespan. And remember, you don't need to assemble anything, they come ready to use right out of the box.