Bullet Proof @font-face syntax (from Stubbornella: https://github.com/stubbornella/csslint/wiki/Bulletproof-font-face)

font-face.scss

@font-face {
    font-family: 'MyFontFamily';
    src: url('myfont-webfont.eot?#iefix') format('embedded-opentype'), 
         url('myfont-webfont.woff') format('woff'), 
         url('myfont-webfont.ttf')  format('truetype'),
         url('myfont-webfont.svg#svgFontName') format('svg');
}