I have been researching cold gear for my fiancee because we just moved to Ohio and we have heard it is going to be COLD here...I started with these because they were less of a monetary investment (under armor is expensive!!)....well, these are great!!  He has even started wearing them around the house at night!  I bought the women's version for myself they are lightweight while still being warm...I'm going to buy more.  He is six feet tall and around 190 lbs...I bought him the large and they fit perfect.