To use these Zim Djarin tank tops, simply put them on and enjoy their comfort. For men and unisex sizes, they'll fit you well from XS to 2XL. Women can choose from XS to 4XL. When it's time to clean them, remember to machine wash cold and turn them inside out. Wash with similar colors to avoid color bleeding. Only use non - chlorine bleach if needed. After washing, you can hang them to dry for the best result, or tumble dry on cool or low heat. But be careful not to use fabric softener because it might make the colors fade. Also, don't iron or dry clean these tank tops to keep them in good condition.