.product-tab .tab-panel-item-wrap.soldout .tab-panel-item{
  position: relative;
}

.product-tab .tab-panel-item-wrap.soldout .tab-panel-item:after {
    position: absolute;
    content: "";
    left: 50%;
    top: 0;
    bottom: 0;
    border-left: 1px solid;
    border-color: #222;
    transform: rotate(45deg) scale(1.5);
}