cloak of invisibility

I am considering buying a special hat or sweater or shirt that while I am wearing it would indicate leave me alone, don't ask me any questions, tell me about your video games, ask me to fetch you anything, tell me about some car I have no interest in, offer to do a chore you are not quite up to just yet, I do not want a hug I do not want to hear about your day I don't want to talk about mine and sorry Oscar I do not want to pet you right this second. Sometimes I just need quiet and to be still and to have a thought every once in awhile that is just about me. I promise not to wear it often but when I am at the end of my rope watch for it.