Comfort.
I got these for my husband for to put in his sneakers after he got off work. He is a stonemason on his feet all day and his back is usually killing him. I thought these would help. He put these in his sneakers and right away noticed a difference. After an hour with these in his sneakers he noticed his back and ankles were not bothering him. Easy to size and place in your shoes.
Rating: 5 stars