Example

Markup
<input type="checkbox" id="cbox" class="input-checkbox">
<label for="cbox" class="input-checkbox_label"><span class="input-checkbox_labelspan">GG Checkbox</span></label><br/>
<div>
<input type="radio" name="freq" checked="checked" value="one-time" id="freqOnce" class="input-toggle"><label for="freqOnce" class="input-toggle_label">one-time</label>
<input type="radio" name="freq" checked="checked" value="monthly" id="freqMonth" class="input-toggle"><label for="freqMonth" class="input-toggle_label">monthly</label>
</div>
Source: modules/05_user_interface/forms_ext.less, line 5