@media (max-width: 768px) {
    .woocommerce ul.products li.product, 
    .woocommerce-page ul.products li.product, 
    .woocommerce-page[class*=columns-] ul.products li.product,
    .woocommerce[class*=columns-] ul.products li.product {
        width: 100%;
        float: left;
        clear: both;
        margin: 0 1% 2.992em;
    }
}