Golf ball 2 has a core 4, a mid layer 5 and a cover 6. The mid layer 5 has a hardness of 50 or greater and 70 or less, and a thickness of equal to or greater than 0.8 mm. The cover 6 has a hardness of less than 57, and a thickness of less than 1.5 mm. The golf ball 2 has numerous double radius dimples...http://www.google.es/patents/US7261650?utm_source=gb-gplus-sharePatente US7261650 - Golf ball
