I moved from Texas back to Michigan a few month ago and this this cold weather is killing my outdoor riding time. If it's about 50 degrees outside I'm good with my short bib and leg warmers but with it being 30-45 degrees my legs are a little too cold. I have proper and warm upper clothing but I need recommendations on a long bib for winter. I'm confused with thermal, radiator, and other terms.

I looked in the local bike shop and they don't have any long cycling pants so I need to order online. Any suggestions on a brand or what to look for? Is a long bib the same as a thermal bib etc?

Thanks.