Men’s Size 15

This core boasts the lowest differential in the new No-Thumb category

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The Velcro closure makes them ideal for quick on-and-off wear

KR Strikeforce Bowling Thumb Sock

Track Theorem Delta Bowling Ball Weights:13 lbs. Men’s Size 15Track Theorem Delta Bowling Ball The Track Theorem Delta builds on the legacy of one of Tracks most trusted performers by enhancing the benchmark motion that made the original so successful. It delivers the same strong midlane read and smooth, sweeping shape while adding a sharper response to friction for increased backend motion and continuation. Compared to the original Theorem, the Delta is more responsive downlane without sacrificing