For best results use on washable fabric. Not recommended for dry clean only fabrics. Store pen with cap on and point facing downward.
Always test marking pen on fabric you are using to be sure marks will completely disappear. Some fiber contents, fabric finishes or dyes (red and pink in particular) may not be suitable for use with this pen.
NOTE: Do not iron over marks or launder before completely removing with plain water. Some laundry products containing sodium hydroxide or sodium carbonate may set marks if they are not completely removed before laundering.