<link href="//netdna.bootstrapcdn.com/bootstrap/3.2.0/css/bootstrap.min.css" rel="stylesheet" id="bootstrap-css">
<script src="//netdna.bootstrapcdn.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>
<script src="//code.jquery.com/jquery-1.11.1.min.js"></script>
<div class="container">
<h1>Packages</h1>
<div class="row">
<div class="panel panel-default clearfix">
<div class="panel-heading">
<h2 class="panel-title">Package Heading</h2>
<p class="small">
Package Description
</p>
</div>
<div class="col-xs-12 toggle-header">
<div class="col-xs-6">
<button type="button" class="btn btn-primary btn-sm hidden-xs" data-toggle="collapse" data-target="#feature-1">
<i class="glyphicon glyphicon-resize-vertical"></i>Toggle Feature Set
</button>
<button type="button" class="btn btn-primary btn-xs visible-xs" data-toggle="collapse" data-target="#feature-1">
<i class="glyphicon glyphicon-resize-vertical"></i>Toggle Set
</button>
</div>
<div class="col-xs-2 text-center">
<span class="hidden-xs">Small</span>
<span class="visible-xs">S</span>
</div>
<div class="col-xs-2 text-center">
<span class="hidden-xs">Medium</span>
<span class="visible-xs">M</span>
</div>
<div class="col-xs-2 text-center">
<span class="hidden-xs">Large</span>
<span class="visible-xs">L</span>
</div>