Thick Black Buffalo hide, heavy with a good impact. When a hide is finished the dye sometimes doesn't penetrate through the denser areas. You may see a stripe of white in the center of the tail. I chose to put the softer thuddier area as the end of the tails. On a scale of 1 to 10 (Velvety Soft to Very Heavy Thud) this would be an 8, with very little sting.