Using these pillow covers is a breeze. Just unzip the cover and insert your pillow. You can use them indoors on your sofa or chair to add a pop of color, or outdoors on a patio set to spruce up the area. Since they're UV and water - resistant, they can handle the sun and a little bit of rain. But it's best to bring them inside during heavy storms. To keep them looking great, simply spot - clean with a mild detergent and let them air dry. No need to worry about assembly; they come ready to use right out of the box. Remember, these are for personal use, not for commercial purposes.