Linking and using San Francisco Web Font

sanfrancisco-font.css

@charset "utf-8";
/* San Francisco Font Regular */

@font-face {
  font-family: 'San Francisco';
  font-weight: 400;
  src: url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.eot'); /* IE9 Compat Modes */
  src: url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.eot?#iefix') format('embedded-opentype'), /* IE6-IE8 */
       url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.woff2') format('woff2'), /* Super Modern Browsers */
       url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.woff') format('woff'), /* Pretty Modern Browsers */
       url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.ttf')  format('truetype'), /* Safari, Android, iOS */
       url('https://applesocial.s3.amazonaws.com/assets/styles/fonts/sanfrancisco/sanfranciscodisplay-regular-webfont.svg#svgFontName') format('svg'); /* Legacy iOS */
}