.js-store-prod-weight:empty {
    display: none;
}

.js-store-prod-weight.t-typography__characteristics::after {
    content: 'кг';
    position: absolute;
}

.js-store-prod-weight.t-typography__characteristics {
    position: relative;
    width: fit-content;
}

.js-store-prod-weight.t-typography__characteristics::after {
    right: -7px;
    background-color: #fcfcfc;
}