A crewneck featuring the image was then made available to purchase on Sanders' website for $45. After initially selling out, the sweatshirt was back in stock on Friday afternoon in sizes small through 2XL. A representative for Sanders did not immediately respond to Insider's request for comment on how much stock was left.
The website also said that because of overwhelming demand, the sweatshirts would arrive in three to six weeks.
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According to the product description, 100% of the proceeds will go toward Meals on Wheels Vermont.
"What was really nice, Seth, is that the woman who made the mittens lives in Essex Junction, Vermont," Sanders said. "She is a schoolteacher and a very, very nice person, and she has been somewhat overwhelmed by the kind of attention that is being shown to her mittens."
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