Soft leather is an unprotected generic name given to particularly soft and supple leather qualities of calfskin and goatskin and the skins of exotic animals. For example, eel leather is particularly soft. Napa leather is known for its softness. Soft leather can be porous, but it can also be surface coloured. When manufacturing soft leather, the tanner has to make sure that the leather is as soft as possible. Usually smooth leather is referred to as soft leather, but nubuck and suede can also be called soft leather.
Since the term is also used for belt leathers which require a certain tensile strength, it is always necessary to check whether the leather has a particular softness. In principle, an object marked "soft leather" should be softer than the usual softness of such leather objects.