Polyester Bowling balls

Various Polyester or sometimes called Spare Balls. 
Ideal for beginner bowlers starting to learn with your own ball - these balls will predominantly go straight where they are bowled even if you try to hook the ball a little bit they will take a much straighter path to the pins. 

Most people who progress on to hook bowling with a reactive ball would also have a spare ball which will be a polyester ball to pick up single pins and any spares that you leave easier than hooking the ball and judging the required hook.