If your an 8.5 or 13 you can still get the Proterra boot from Dick's. It's been a good boot. I don't know why they stopped making them. I've had a pair for about nine months now. Google Proterra GTX boot. There are lots of companies out there that sell discontinued and have old stock. Initially I didn't like how thick the bottoms were but I like them well enough now. Sierra trading Post is a favorite go to for me when looking for discontinued items.