Hold the salami and give me more Holy Cow. Stop drooling about the cutlets behind the counter and order up some luxurious Holy Cow™ leather on your onion roll. Crumpler Holy Cow real leather is a strong 1.2 - 1.4 mm thick cow leather. In order to stand out in brilliant colours in a long lasting product with a smooth and shiny demeanour we refine the surface of our leather by using special treatment.