As they say in the classics, Hope Sandoval could sing the telephone book and I would most likely be curled up in a ball on the floor, sobbing uncontrollably. Kurt Vile? I suspect that if he started working his way through the White Pages I would be exiting the room around the time he got to "Ab". (No disrespect; he is a very gifted tunesmith (n.b. not faint praise) and knows just how to land his voice in the right (if sometimes unorthodox) place.) So I am as surprised as you are that these two voices could mesh together as seamlessly as they do on this smouldering seven-and-a-half-minute number. It's like they are trying to out-chill each other. (And succeeding!)
And yet the real hero of this song is the guitar. Two guitarists are listed in the credits, so I don't know who to give the plaudits to. But you know who you are. Thanks, pal.