There is only one "Dimple" and it's the Kookaburra Dimple, because Kookaburra invented the dimpled surface especially for artificial turf. Imitations cannot copy Dimple's perfect heart - its quilt centre with three layers each of cork and worsted yarn built over a cork and rubber nucleus, finished off with a generous layer of winding. It's the full flawless construction which makes Dimple the world's leading hockey ball.