the new mg4+ o2 golf shoe—pronounced oh · too—takes the athletic design and comfort of the best selling mg4+ and amplifies them. the latest footwear addition is designed to bolster performance with an innovative sole design featuring softspike technology and lateral traction lugs. the intense grip is a critical benefit to balancing and perfecting that swing. breathe new life into your game with the o2. features - made with premium waterproof t.p.u. - g/lock technology cleats with replaceable tour flex pro® softspikes - removable & washable massaging insoles - locked in stability with external heel counter - responsive auxetic lattice midsole & sidewall - fully padded mesh interior lining - odor inhibiting triple density foam cushion footbed fit narrow fit, if you are between sizes, we recommend ordering up. materials upper: 87% t.p.u. / 10% polyester / 3% silicone lining: 85% nylon / 15% spandex bottom: 90% rubber / 10% eva care clean with a mild soap & let the shoes dry in a well, ventilated area. do not put in the sunlight or dryer.