I got a merino wool mesh baselayer this morning, and wore it on a rode this afternoon.
this one: https://us-nordiclife.glopalstore.com/collections/mens-base-layers/products/brynje-super-thermo-shirt-with-inlay
I am happy to report that it works as advertised.
https://sectionhiker.com/brynje-wool-thermo-base-layers-review/
https://www.bikeradar.com/us/gear/category/clothing/undershirts-and-base-layers/product/brynje-super-thermo-baselayer-review-51910/