@font-face {
    font-family: 'SFProDisplay-Heavy';
    src: url('fonts/SFProDisplay-Heavy.eot');
    src: url('fonts/SFProDisplay-Heavy.eot?#iefix') format('embedded-opentype'),
         url('fonts/SFProDisplay-Heavy.woff2') format('woff2'),
         url('fonts/SFProDisplay-Heavy.woff') format('woff'),
         url('fonts/SFProDisplay-Heavy.ttf')  format('truetype'),
         url('fonts/SFProDisplay-Heavy.svg#SF Pro Display') format('svg');
}