$susy: (
  flow: ltr, // ltr | rtl
  output: float, // float | isolate
  math: fluid, // fluid | static (requires column-width)
  column-width: true, // false | value
  container: 100%, // length or % | auto
  container-position: left, // left | center | right | <length> [*2] (grid padding)
  last-flow: to,
  columns: 12,
  gutters: 1/2.4,
  gutter-position: split, // before | after | split | inside | inside-static (requires column-width)
  global-box-sizing: border-box, // content-box | border-box (affects inside/inside-static)
  debug: (
    image: hide,
    color: rgba(#66f, .25),
    output: background,
    toggle: top right
  ),
  use-custom: (
    background-image: true, // look for background-image mixin
    background-options: false, // look for background-size, -origin and -clip and other compass/bourbon mixins
    box-sizing: true, // look for custom bix sizing mixin
    clearfix: false, // true = look for internal clearfix before using micro clearfix
    rem: false, // look for rem mixin
  )
);