I have been buying slippers like these for 30 years.  These are the best quality I have had.  The leather is thick and durable as is the inside.  They are very warm to the point where I have to take them off occasionally as my feet get too hot.

The best part are the rubber soles.  They go up the side an inch.  This allows me to walk on rainy grass and sidewalks with them in the morning when I go out to the curb to get my newspaper, and I don't have to put shoes on.  Careful on the size, though.  I am a size 11.5 to 12 and bought size 13 and they are a little tight.  I'd buy up one size.