Envolver elementos flutuantes

Envolva elementos flutuantes com a classe clean.

<div class="clean">
    <div class="w50 float_left">
        Netus feugiat pharetra, parturient,
        nascetur, aenean corporis.
    </div>
    <div class="w50 float_right">
        Facilisis consequatur fugiat eu nibh
        diamlorem aliquam sunt in culpa.
    </div>
</div>

.clean::before, .clean::after {
    display: table !important;
    content: '' !important;
    clear: both !important;
}