To wear this hoodie, just slip it on like any other hoodie. It's great for casual outings or staying cozy at home. When it comes to sizing, remember to order 1 - 2 sizes larger than your normal size because our international sizing is a bit smaller than the US standard. You can refer to the size chart for accurate measurements. For cleaning, simply put it in the washing machine with cold water, use a gentle cycle and mild detergent, then hang it up to dry. The measurements are close but might have small differences, and the color on your screen may look a bit different from the real hoodie due to monitor settings. Enjoy wearing your stylish galaxy - pattern hoodie!