Sportime Max Yellow Playground Ball sized 8.5-inch features a tough rubber shell, is leak-proof and has a 70 percent butyl bladder for superior airtight inflation. This high-optic yellow color and crosshatch surface pattern of the ball provides children with an ideal color they can track easily and a texture they can comfortably grip. It features a two-ply construction that is essential to maximize the air retention of natural rubber. The flex-matrix grip pattern is formed by thousands of hexagonal cells, representing a bee-hive matrix whose walls freely flex under the pressure of grasping. This pattern is deeply embossed into two plies of formulated softouch rubber.