app/assets/stylesheets/uswds/elements/_inputs.scss in uswds-rails-1.4.3 vs app/assets/stylesheets/uswds/elements/_inputs.scss in uswds-rails-1.4.4

@@ -110,10 +110,12 @@
   -moz-appearance: none;
   -webkit-appearance: none;
   appearance: none;
   background-color: $color-white;
   background-image: asset-url('#{$image-path}/arrow-both.png');
-  background-image: asset-url('#{$image-path}/arrow-both.svg');
+  // Ensure browsers that don't support SVG in background-image (IE 11 and below) fall back to PNG.
+  // See https://www.broken-links.com/2010/06/14/using-svg-in-backgrounds-with-png-fallback/
+  background-image: none, url('#{$image-path}/arrow-both.svg'), url('#{$image-path}/arrow-both.png');
   background-position: right 1.3rem center;
   background-repeat: no-repeat;
   background-size: 1rem;
   padding-right: 3rem;