Sparkbox’s sb-media mixin with a max-width option.

gistfile1.sass

@mixin sb-media($min, $max:"") {
  @if $no-mq-support{
    @if $min < $serve-to-nomq-max-width{
      @content;
    }
  }
  @else if $max != "" {
    @media ( 'min-width:' + $min ) and ( 'max-width:' + $max ) {
      @content;
    }
  } @else {
    @media ( 'min-width:' + $min ) {
      @content;
    }
  }
}