.mask-hover-caption{ top: 0px;left: -100%; -webkit-transition: all 0.3s ease; -moz-transition: all 0.3s ease-in-out; -o-transition: all 0.3s ease-in-out; -ms-transition: all 0.3s ease-in-out; transition: all 0.3s ease-in-out; } .mask-hover-inn:hover .mask-hover-caption { left: 0px; }