This is a medium weight cotton flannel FR shirt from Bulwark.  It's rating is 7.7 ATFV.  It's a size men's XL:
                                                                                    pit to pit- 25''
                                                                                    sleeves- 25''
                                                                                    length in back- 32''
This is actually a little roomy as an XL- great for work movement!   Really a sharp work shirt for sure!   ~   Click on the ''visit store'' for more stuff...