.collection-slider {
    display: flex;
    flex-wrap: wrap;
    padding-top: 30px;
}
.collection-product-grid {
    flex: 0 0 25%;
    padding: 0 15px;
}

@media screen and (max-width: 749px) {
.collection-product-grid {
    flex: 0 0 50%;
    padding: 0 5px;
}
}