Looking for Liner material for shotgun sleeve

I’m going to try making a waxed canvas shotgun sleeve. Does anyone have recommendations on a fabric for the interior lining? This one pictured from Duck Camp uses tricot (I’m not familiar). I’ve seen fake shearling mentioned elsewhere as well.

I’m going to try making a waxed canvas shotgun sleeve. Does anyone have recommendations on a fabric for the interior lining? This one pictured from Duck Camp uses tricot (I’m not familiar). I’ve seen fake shearling mentioned elsewhere as well.