On Saturday and Sunday at Augusta National in 1986, Ballesteros arrived on the first tee wearing a white visor bearing two Nike swooshes — an unusual sight at a time when Nike had only just entered professional golf.

Ballesteros had already won the Masters twice, in 1980 and 1983, and had recently become Nike’s first golf ambassador. On the first two days of the 1986 Tournament, he wore a visor he had bought in the pro-shop, but on the weekend that changed. Seve cut two Nike labels from his shirts and fixed them over the visor’s logo, and just like that, the Double Swoosh visor was born. In some pictures, you can still see a small “M” beneath the swooshes, a detail that reflects the improvised nature of the moment.