There are two reasons for leather getting hard: age and dryness. Without regular care leather will get stiffer and stiffer with age. Another reason can be a shrinking due to heat. The leather in older cars was dyed vegetatively (backside of the leather is brown) and started to shrink at temperatures around 70C. Without regular care the leather's shrinking temperature is further decreasing.
A stiff leather can be softened again to a certain extend. The shrinking process of leather, however, is permanent and irreversible. In both cases a treatment with Leather Softener is advisable, as the shrinking of leather can be stopped and stiff leathers can be rejuvenated. Leather Softener is a purely synthetic oil and will neither smell nor oxydise as animal fats or oils do (e.g. fish oil or neats foot oil).
250ml