Mattresses: Signature Sleep Flex 8″ Charcoal Gel Memory Foam King Mattress For $187.30 After $126 Price Drop And More! This was selling for $313.11 yesterday and is now the lowest price ever from Amazon. Signature Sleep Mattress, Queen Mattress, 12 Inch Hybrid Cool Gel Mattress, Queen, was $537.36, now $203.58 Signature Sleep Mattress, King Mattress, […]