This non-woven microfiber material is designed to offer the maximum amount of slide on modern synthetic approaches. Works best on synthetic approaches in high humidity environments. Also great on older, oil soaked, wood approaches and for stroker type players who want the maximum amount of slide on sticky approaches. When choosing the proper slide soles the goal is to neutralize or balance the approach conditions with the right 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. Remember to keep soles dry, never use a wire brush, test new soles on approach before bowling, and one size fits all. You must trim the Perfect Slide Soles before attatching them to your shoes and you should never wear your shoes with the VELCRO fasteners exposed as this will contaminate them.