This specially developed perforated red leather is designed to minimize the amount of slide and hold its coefficient of friction longer than the competitions. The bowling approach recommended is for the most slippery of approaches, such as low humidity or dusty environments.Bowlers Style is for the modern day power-player who wants the least amount of slide. When choosing the proper slide soles the goal is to neutralize or balance the approach conditions with the bowlers style to find your Perfect Slide. A slippery approach will require a lower numbered (PS2, PS4 or PS6) slide sole. And a sticky approach will require a higher numbered (PS6, PS8 or PS10) slide sole.You must trim the Perfect Slide Soles before attaching them to your shoes and you should never wear your shoes with the VELCRO fasteners exposed as this will contaminate them.