select.form-control {
  -webkit-appearance: none;
  -moz-appearance: none;
  appearance: none;
  padding-right: 2.2rem;
  background-color: hsl(0, 0%, 100%);
  background-repeat: no-repeat;
  background-position: 100% 50%;
  background-size: 2rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 48 100'%3E%3Cpath d='M0 0h48v100H0z'/%3E%3Cpath fill='%23fff' d='M31.99 43.99l-8.03 8.03-8.02-8.03L13.93 46l10.03 10.04L34 46l-2.01-2.01z'/%3E%3C/svg%3E");
}

select.form-control[multiple] {
  background-image: none;
}