Speaking of jerseys, I have some base layers along the lines of Under Armour (mine are by Jockey). They fit tight to the skin, which is somewhat disturbing to look at in the mirror, but work like a charm.
The base layers are thin polyester material that wick moisture away from the body. They add to the rider’s comfort, because they can warm a bit on a chilly day, and cool a bit when it’s hot and humid. I have a t-shirt and a tank top, and have used them both throughout the spring.
But today, the temperature was already well into the 80s when I left on my ride, and it was only going to go higher. I skipped the base layer. When I got back after a 24-mile hill workout, the temperature had risen to 94°F (34°C) — hey, this is central Texas and will probably be this way until late September — and I was drenched with sweat.
If I had worn the base layer, it might have minimized some of that drenching. But it might also have made me warmer on an already hot day.
Do you use base layers? Is there a temperature cutoff point at which you won’t wear them anymore?