Historical clue formulations

• Cover for "little piggies" — 2020-11-08
• One might be made for the shower — 2013-12-13
• Infant's shoe — 2012-10-07
• Little foot warmer — 2008-12-22
• 8-Down's footwear — 2002-06-02
• It covers little piggies — 1994-10-14