Fieldset

Groups related controls under one legend.

Source: src/stylus/elements/fieldset.styl

Default

A legend names the group for assistive technology as well as sighted readers.

Notifications 
<fieldset>
  <legend>Notifications</legend>
  <label class="checkbox-field"><input type="checkbox" class="checkbox" checked /><span>Email</span></label>
  <label class="checkbox-field"><input type="checkbox" class="checkbox" /><span>SMS</span></label>
</fieldset>