Historical clue formulations

• Shoe insert — 2022-06-21
• Sneaker insert — 2021-01-06
• Sole supporter? — 2019-07-26
• Sole mate? — 2019-03-01
• Shoe-in? — 2017-08-25
• Sole mate? — 2013-06-15
• Shoe insert — 2010-10-03
• Product associated with the annual Rotten Sneakers Contest — 2010-08-28
• Something good for the sole? — 2010-06-19
• Shoe insert — 2007-05-11