Simple mixin for throwing a fallback class on min width media query for IE. Via http://www.alwaystwisted.com/post.php?s=2012-08-06-a-sass-mixin-for-media-queries-and-ie

respond-to-with-fallback.scss

@mixin respond-to($media) {
  @media #{$media} {
    @content
  }
}

@mixin respond-to-fallback($media, $wrapper-class) {
  .#{$wrapper-class} & {
    @content;
  }
  @include respond-to($media) {
    @content;
  }
}