To use this hoodie, simply put it on like any other top. It's great for casual outings or just relaxing at home. When it comes to sizing, remember to order 1 - 2 sizes bigger than your normal one because the international sizing is a bit smaller. As for maintenance, you can machine wash it in cold water using a gentle cycle and a mild detergent. Then just hang it up to dry. Be aware that the color you see on your monitor might be a bit different from the actual hoodie, and there could be a small measurement error due to hand - measuring.