What do you wear under your biking jacket or Jersey to absorb the sweat? My torso becomes a sweaty mess, then I freeze on the way home which is downhill from the park loop.

So I got the bottom half down - shoe covers and tights over the bike shorts seem to do the trick. Biking bamdana covers the ears, and I have a collection of various thicknesses of gloves.

On top I have a Peral Izumi Gavia biking jacket with a long sleved polyester running shirt underneath - not working . Fine when I leave the house, but too hot when I get going, then not warm enough on the downhill home.

What does everyone wear on top to stay not too sweaty but still warm enough?