What did cavemen use fur for, other than clothing?
You would probably get more and better answers if you defined your question better. “Cavemen” could mean Cro Magnum, Neanderthals, Homo Erectus, …. History does not go back that far, and fur rots away erasing the archaeological information that could answer your question without speculation. Our best information on this subject is to assume that they used fur in the same ways that stone age men in historical times used it: Towels tenting construction material for wigwams Feminine napkins mats rugs sacks tarps construction material for boats food wrapping bandages doors room dividers drum skins whips good luck charms strips of fur were used for men to carry with them to remind them of their lovers while away.