@media only screen and (max-width: 480px) {
    .prodImg img { max-width: 250px; max-height: 250px; margin: 0 auto 20px; }
    .btn.virtualsample { margin: 0 auto 20px; display: block; }
    .ProductDetailsQuickViewBasic ._33,
    .ProductDetailsQuickViewBasic ._66 { display: block; width: 100%; float: none; }
}