Etonic Women&#39;s Lady Skull Sport Bowling,White/Black,10 M US 100% Manmade Rubber sole Improved performance for the entry bowler with stylish designs feature our Perfect Slide Sole technology and a newly designed concave textured rubber sole to produce a longer, more controlled slide Elastic tongue straps hold tongue in place for a secure, comfortable fit Perfect Slide sole technology on both feet for a longer, controlled slide