What are “good shoes”?
Personally, I like $20 tennis shoes because I can tear them to shreds without hurting my pocketbook. They are light, not bulky, and offer enough protection that I am not hurt in the caves. The only area they don’t cover is that of ankle support, but I have yet to twist an ankle on the very uneven footing the floor has to offer. (Knock on wood.) The official recommendation is that you wear some kind of hiking boots.
