presta
Legendary Member
I don't like tight fitting stuff in hot weather, it just feels hotter, which is why I prefer an ordinary loose T shirt. I also roll the waistband of my Lycra shorts down to hip level.Many 'technical' fabrics these days feel kind of shiny and 'plastic-ey' on the inside, which makes them rather uncomfortable without a base layer when sweating. I avoid those if I can help it, and try to find fabrics that feel nicer against the skin.
Generally though, overheating is less of a problem on the bike than walking because you have a faster airflow, and don't have heavy boots, thick socks, and a rucksack insulating your back.