KEEN Women's Steens WP Hiking Shoe (Open Box)

I own two pairs of these shoes (the vent version) in size 9 and both of them are very big on my feet to the point that I need to wear thick socks to make it work. So I felt pretty confident that the waterproof version in the same size would fit even though the waterproof membrane takes up some space inside the shoe. But these shoes had a weird bump/protuberation on the inside that made them smaller and very uncomfortable. I only tried on one shoe and knew right away that they are going back. Fortunately I have my two other pairs - I just thought it would be nice to own a waterproof version as well. I also own the waterproof boot version of these, and they also fit fine in size 9 with room to spare. So no idea what's going one with these and if I maybe just got a "bad pair" or something. Will not bother to order a larger size.