Maxfli Revolution EXT Golf Ball (12 Pack) Golf balls with low-compression core, Speedmantle middle layer, and soft ionomer cover Core designed to be fast and low-spinning off the driver to increase distance Speedmantle designed to increase distance off the driver and create spin off the short irons Cover designed to grip irons to optimize distance-control and green-grabbing backspin Intended for players with average and above-average swing speeds