Technical fabric (which means polyester or with rayon blend) jersey but light/bright colours on a hot, humid day. My short sleeves are not tight around my arms. Only black tops, if it's sleeveless which for me, is an off-bike top.

I tend to wear my jerseys not tight against my body anyway...which to me, is liberating. I can't, I'm quite small-boned and small all over, anyway.

I actually never wear tank tops nor sleeveless tops when I cycle. AFter all these years of cycling..last 18 yrs.

(I'm actually glad, cause I can see the difference in skin quality after years of cycling sun exposed skin vs. areas with less. I don't worry about wierd tan lines, my natural skin colour isn't stark white anyway.)