6.3" Rhino Skin Softie Ball Rainbow SetThis 6. 3" Rhino Skin Softie Ball offers the durability of a rhino skin ball but the soft flexible foam of a regular density foam ball. Great for younger players you'll find hundreds of uses for this softie rhino skin. Rhino skin balls are made tough. Comparable to other brand name coated foam ball but at an economical price. Soft and safe these balls are always a hit in your P. E. class. Rainbow set of 6.