The mid-size heads on the S18 wedges feature a ‘Loft Specific’ Centre of Gravity throughout the lofts in which weight is shifted progressively higher up the blade in the more lofted wedges via a visibly thicker beveled topline, to create more consistent spin rates on strikes from high in the clubface that become more common in the highest lofts.
The S18 wedges benefit from Mizuno’s most refined ‘Loft Specific Design’ but share a rounded silhouette shape, which allows the blade to open easily without impacting alignment.
Each wedge loft has its own unique profile, sole grind and groove depth, engineered to be most effective for its intended use. The ‘Loft Specific’ groove design on the S18 wedges incorporates narrower and deeper Quad Cut Grooves in the stronger lofts, which are more beneficial on full shots, while wider and shallower grooves are utilised in the higher lofts to maximise performance on partial shots.
Source: Bunkered.com