@font-face {
    font-family: 'Avenir';
    src: url("avenir-light.otf") format("opentype"), /* IE6-IE8 */
        url('avenir-light.woff') format('woff'), /* Modern Browsers */
        url('avenir-light.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}
@font-face {
    font-family: 'AvenirNext';
    src: url('avenir-next-ultralight.otf') format("opentype"),
        url('avenir-next-ultralight.woff') format('woff'), /* Modern Browsers */
        url('avenir-next-ultralight.ttf') format('truetype');
    font-weight: normal;
    font-style: normal;
}