.product-thumb--out-of-stock {
    position: relative;
}

.product-thumb--out-of-stock:before, .product-thumb--out-of-stock:after {
    background: rgba(0,0,0,0.4);
    bottom: 0;
    content: '';
    display: block;
    height: 1px;
    left: 0;
    margin: auto;
    position: absolute;
    right: 0;
    top: 0;
    -webkit-transform: rotate(-45deg);
    transform: rotate(-45deg);
    width: 100%;
}

.product-thumb--out-of-stock:after {
    -webkit-transform: rotate(45deg);
    transform: rotate(45deg);
}

.product-thumb--out-of-stock img {
    opacity: 0.4;
}

.product-thumb--out-of-stock.is-selected > img,
.product-thumb--out-of-stock.is-nav-selected > img {
    opacity: 1;
}

/* not currently used. It was used in the collection template to toggle visibility of out of stock items */
// #button--toggle-visibility-of-out-of-stock-items {
//     color: #333333;
//     display: inline-block;
//     background-color: #ffffff;
//     font-family: Montserrat, sans-serif;
//     font-weight: 400;
//     font-size: 12px;
//     text-transform: none;
// }