Edit in JSFiddle

 <nav class="navbar navbar-light bg-faded">
  <input type="checkbox" id="navbar-toggle-cbox">
        <label for="navbar-toggle-cbox" class="navbar-toggler hidden-sm-up" type="button" data-toggle="collapse" data-target="#navbar-header" aria-controls="navbar-header">
          &#9776;
        </label>
        <div class="collapse navbar-toggleable-xs" id="navbar-header">
          <a class="navbar-brand" href="#">Brandname</a>
          <ul class="nav navbar-nav">
            <li class="nav-item active">
              <a class="nav-link" href="#">Home <span class="sr-only">(current)</span></a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Features</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">Pricing</a>
            </li>
            <li class="nav-item">
              <a class="nav-link" href="#">About</a>
            </li>
          </ul>
        </div>
      </nav>

#navbar-toggle-cbox:checked ~ .collapse {
    display:block;
}

#navbar-toggle-cbox {
   display: none;
}