I purchased these shoes in 1999, from Niketown. I’ve worn them a handful of times, in the last 24 years. Other than that, they’ve been in a box. The last time I wore them, about 6 years ago. I noticed they felt weird. I looked down, and saw that the foam had compressed (not sprung back), and that it began crumbling! I was so upset, I went home and put them back in the box. I did some research, and found that, the type of foam used for the mid soles, will become brittle over time, especially if not worn. I also did research, and I understand that people can replace the bottom portion. The remainder of the shoe is in Excellent condition. *see photos. No original box, just shoes (I have them in a regular Nike box)