We carry a thin mule skin with hair that is a perfect match for any djembe. For bongo machos, we have changed to using horse skin. Horse is a bit brighter than mule skin, yet it is every bit as tough and tonal.
In the past we offered what we thought were thick mule skins for congas, but a DNA test from a major agricultural university revealed that they have absolutely no horse, mule or donkey genetics. They do have some bovine DNA markers, but it is possible they are actually water buffalo or cow. These skins can perform well especially for the thick conga head aficionados and we do have them in our store.