SASSy font awesome checkboxes.

checkboxes.scss

input[type="checkbox"] {
  display: none;

  & + label {
    -webkit-touch-callout: none;
    -webkit-user-select: none;
    -khtml-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
  }

  & + label:before {
    font-family: FontAwesome;
    display: inline-block;
    content: "\f096";
    letter-spacing: 10px;
  }

  &:checked + label:before {
    content: "\f046";
    letter-spacing: 5px;
  }
}