Pull Buoy PG Sof's Playground Balls - 8" (Set of 6)P. G. Sofs are roto molded from foam vinyl and combine the best features of traditional rubber playground balls and coated foam balls. Sofs are supple, squeezable, "sting free" and bounce like a rubber ball! Sofs don't have internal bladders, so their designated diameter can be varied by an inch or two to find the desired softness and bounce. Set of six colors (1 each of red, yellow, blue, green, orange and purple). Unit of Sale : Set