These men's t - shirts and premium t - shirts are great for daily wear. When you want to put them on, just slip them over your head. For sizing, choose according to the size chart (S - 6XL for regular t - shirts and S - 3XL for premium ones). When it's time to clean, machine wash them in cold water, turning them inside out and washing with similar colors. Only use non - chlorine bleach if necessary. After washing, you can either hang them to dry for the best results or tumble dry on a cool or low - heat setting. Don't use fabric softener because it can make the colors fade. Also, don't iron or dry clean these shirts to keep them in good condition.