I've been searching for a breathable shoe that also has good support for walking daily since Adidas USED to have ultraboost 21s with climacool technology and for some stupid reason they quit making them. I have the regular ultraboost 21s and my feet get so hot in them, even though they are comfortable. I walk about 4 miles daily and my feet get super hot in the summer to the point where it's all i can think about. I bought these even though they are hideous. I love that the soles are vented and all over is vented so my feet can actually feel the wind while im walking. They are a little tough to put on (im talking about with socks- i would never wear sneakers without socks) since they are made of rubber. My right foot is slightly wider than my left and after a few miles, i noticed my pinky toe would rub a little bit on the side. The arch provides bouncy support and the shoes are light weight. I wish they weren't so ugly - i call them my martian shoes. Even if they came in solid all black it would be better. Overall very comfy. If not walking on flat ground ( specifically talking about the sides of the street which are sloped downward for drainage where i live), you can feel how unstable they are and cause ankle discomfort. The laces they come with are so skinny and cheap, so those will be replaced soon. Adidas these are comfy and breathable but can you work on a shoe that is not so ugly for us people with hot feet?