Yes, but I don't wear a suit, and can even wear sandals when it is hot. Dress shirts are like my favorite cycling shirts, though for not-too-hot weather. I even do long rides/tour with them. Your body will probably adjust some. Take it easy if it is hot, and it isn't much different than walking. In fact, the breeze you create can makes me have less sweat on me (and my clothes) than with walking on hot days.