I workout, stretch and run outdoors three to four times a week, it’s a routine I like.

It’s November already and it’s getting cold. I have a 100% merino wool mid layer long sleeved shirt I spent 130$ on I wear to the office but I don’t want to ruin it working out, stretching and running because it was expensive.

This piece of clothing is quite thick, like 2 layers put together. I don’t want to buy anything thinner for sport because I’ve read thinner undershirts/base layers break due to friction.

This is what I fear is going to happen with my merino mid/base layer if I workout with it, even if it’s on the thicker end of layers.

Another option would be to buy a regular polyester base layer to use with a synthetic mid layer or combine a synthetic base layer and a cotton mid layer. Would these be stupid ideas?

What should I use as an outer layer?

Overall, what brands would you recommend? I’m a skinny 5’6’’ woman.