The MG4+ O2 Golf Shoe a " pronounced Oh A Too a " takes the athletic design and comfort of the best-selling MG4+ and amplifies them This version is our latest iteration designed to bolster performance for those who prefer a spikeless option The sawtooth traction pattern offers excellent grip to promote that perfect swing while the external heel counter provides extra stability a " breathe new life into your game with the O2. DESIGN: Water repellent material External heel counter for locked-in stability Auxetic lattice midsole and sidewall IN-SHOE COMFORT: Fully padded mesh interior lining Removable and washable massaging insoles DURABILITY & TRACTION: Sawtooth traction pattern for excellent grip