This is a stiff rubber bar that is not unlike a large eraser.  It will crumble as you use it.. It is soft but stiff.  It can crack easily if you are too firm with it.. You shouldn't be anyway, because the proper way to use it is to lightly brush your leather nap.  The dirty oil and dirt is picked up and rolled into the rubber particles.  Be prepared for a big mess though..  Have a hand-vacuum cleaner handy, otherwise this will get all over the place.

The bar is white and will actually work to lighten the leather.  I'm not sure if white pigment is making the leather lighter, or if it's cleaning it.. Nevertheless it spared my creamy suede leather jacket from the trashcan.

Works amazing, highly recommended.