what iv noticed is that jerseys are nice for long rides Because you can put your snacks in them, they are extremely breathable and can control the ventilation if you have a zipper and they are just all around more comfortable. After riding with cycling socks or extremely thin non-padded running socks i will never go back, they give you way better breathability, shoe fit, and most importantly better blood circulation. regular socks at least for me make my toes go numb.