JSFiddle - React, Tailwind, and code Playground

HTML

<link rel="stylesheet" href="http://netdna.bootstrapcdn.com/font-awesome/4.0.0/css/font-awesome.css">
<span class="fa"></span>

CSS

span {
    position: relative;
}

span:before {
    content: "\f099";
    position: absolute; 
    font-size: 1.5em;
    left: 2px;
    top: 2px;    
}

span:after {
    content: "\f096";
    position: absolute; 
    font-size: 2.1em;
    left: 0;    
}