I did not know, I've only started listening to him. I'll be real with you and admit that I don't even know what Felt 3 is.
It's cool. Felt is a collaboration project between Slug of Atmosphere and Living Legends rapper Murs. They have had three albums and all have had a different producer. The second one was done by Ant of Atmosphere and the latest one, Felt 3, was produced by Aesop. Give it a listen.
Actually dig this track. Was coming in preparing to dislike, as Atmosphere has got so boring lately (though I don't wish to see them go back in time either) and Aesop Rock is one of the ten worst rappers alive, but there's something about the way he spits that is constantly interesting. Aes' verse is terrible in this, but the way he conveys it makes me forget that the lyrical content is so blahhh.
I love that old Aes song he did with Slug, though...