Pelts

Having hides is okay, tanning would go too far. Wolves can't extract many of the additives needed to properly tan a hide.

That being said, skin separates pretty easily from subcutaneous tissue when pulled the right way, so I imagine rough/coarse pelts would be perfectly fine. A wolf could possibly try to extend their shelf-life by maybe curing them somehow (sunlight, saltwater, maybe a sulfur-rich water source like the geysers) but yes, hides would be perishable at some point and not truly preserved the way tanned hides are.

Hope that helps. :)