Treat yourself to a nice pair lined with shearling. Like these LL Bean models.
Like Sargent Edgar (my father) and Colonel Potter from MASH used to say...a good soldier takes care of his feet. Occasionally its perfectly OK to be as generous with yourself as you are with others.
Men's Wicked Good and reg; Lodge Chukkas: Men's Slippers | Free Shipping at L.L.Bean