.insta-photos span.insta-img-wrapper .insta-comment {
    display: none;
    background: rgba(0,0,0,0.6);
    color: #fff;
    position: absolute;
    left: 0;
    top: 0;
    height: 100%;
    width: 100%;
    text-align: center;
    padding: 50px;
}
.insta-photos span.insta-img-wrapper {
    display: inline-block;
    height: 300px;
    width: 300px;
    overflow: hidden;
    float: left;
    position: relative;

}
.insta-photos span.insta-img-wrapper:hover .insta-comment {
    display: block;
    -webkit-transition: all 200ms ease-in;
    -ms-transition: all 200ms ease-in;
    -moz-transition: all 200ms ease-in;
    transition: all 200ms ease-in;
}
.insta-photos span.insta-img-wrapper a {
    display: block;
    position: absolute;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background: url() no-repeat center center;
    -webkit-background-size: cover;
    -moz-background-size: cover;
    -o-background-size: cover;
    background-size: cover;
}

.insta-photos,
.insta-photos img {
    height: 300px;
}