.img-parallax {
  height: 550px;
  width: 100%;
  overflow: hidden;
  position: relative;
}
.img-parallax .img-container {
  position: absolute;
  width: 100%;
  height: 800px;
  left: 0;
  top: -150px;
  background-size: cover;
  background-position: center;
}