Tom,<br><br>I just pulled my Zippo out, unwrapped it and looked. Mine has a thick block of batting (unknown material, but felt of some sort) covering a stuffing of white, fiberous, cotton-like material.<br><br>I pulled a small clump of the "cotton" from the chamber with my trusty SAK tweezers, allowed the lighter fluid to evaportate, then sparked it with my FireSteel. It burned just like a cotton ball, easy to spark, yellow/orange flame, very small residue, odor not of hair but of wood.<br><br>I think it is cotton. <br><br><br>