<form><div class="field">
<div class="ui toggle checkbox activado">
<input class="etiqueta" type="checkbox" id="confirm" name="confirmed">
<label>...</label>
</div>
</div>
</form>
<form><div class="field">
<div class="ui toggle checkbox activado">
<input type="checkbox" id="confirm" name="confirmed" checked="">
<label>...</label>
</div>
</div>
</form>
<form><div class="field">
<div class="ui checked toggle checkbox activado">
<input type="checkbox" id="confirm" name="confirmed" checked="">
<label>...</label>
</div>