I have severe foot pain from Rheumatoid Arthritis and the cushion is perfect when brand new, but after washing diminishes :( So comfortable 16+ hours per day, every day, this flaw didn't prevent me from buying a second pair to get through winter. I will be buying another pair for spring. After struggling with my feet and spending hundreds of dollars on pain relieving creams, specialist appointments, x-rays, and night braces, to have a simply perfect fitting house shoe that cushions each step I am  over the moon. Four pairs a year is a small price to pay after years of trying everything else.