Using your Better With Dogs long sleeve T - shirt is easy. Just put it on and show off your love for pets! When it comes to washing, you can simply toss it in the washing machine as it's machine - wash safe. However, to keep it in the best condition, try using a gentle cycle. As for the colors, be aware that the heather colors are a blend of 50% cotton and 50% polyester, and solid colors are 100% cotton, so they might react a bit differently to detergents. Also, remember that the preview image color may not exactly match the real shirt due to lighting or your monitor. If you have any questions, don't hesitate to contact us.