SCSS

      @include ie-only(9) {
        .my-class {

        }
      }
    

CSS

      .ie9 .my-class {

      }
    

SCSS

      @include ie-only(10) {
        .my-class {

        }
      }
    

CSS

      // IE10+
      @media screen and (-ms-high-contrast: active), (-ms-high-contrast: none) {
        .my-class {

        }
      }