Featuring an innovative design that integrates two separate materials, the Saw tooth Slide Sole creates three unique zones - including the center "saw tooth" zone which includes a blend of two materials for a smoother transition during your slide. The S7 is designed for a lower-resistance slide, offering slightly less resistance than the S6 but slightly more resistance than the S8. One size fits all Unique hexagon shape Symmetrical design can be inverted based on bowler preference