To use your 'Crest of Knowledge' sweatshirt, just put it on and enjoy its comfort. When it's time to clean, machine wash it cold, turning it inside out and washing with like colors. Only use non - chlorine bleach if needed. For the best look and to keep the fabric in good condition, hang it to dry. You can also use the tumble dry setting on cool or low heat. Be careful not to use fabric softener as it can make the colors fade. And remember, don't iron or dry clean this sweatshirt to maintain its quality.