Patent ID: 8292759

Claim:
A golf ball comprising a core, an envelope layer positioned outside the core, a mid layer positioned outside the envelope layer and a cover positioned outside the mid layer, wherein, a thickness Tm of the mid layer is equal to or less than 1.0 mm, a thickness Tc of the cover is less than 0.6 mm, the sum of the thickness Tm and the thickness Tc is equal to or less than 1.5 mm, a Shore D hardness Hc of the cover is equal to or less than 38, and the Shore D hardness Hs of the envelope layer, the Shore D hardness Hm of the mid layer, and the Shore D hardness Hc of the cover satisfy the following formula (1) Hs>Hc>Hm (1), wherein a difference (Hs−Hc) is equal to or greater than 29 and equal to or less than 35, and a difference (Hc−Hm) is equal to or greater than 6 and equal to or less than 12.