Remove Typekit from mobile devices all together.

typekit.js

  <script>
  //Replace this with your desktop Typekit code
  var kit = 'xxxxx'
  // Adjust the width threshold
  if( window.innerWidth > 800 ) {
    document.write('\x3Cscript src="//use.typekit.net/'+ kit +'.js">\x3C/script>');
    document.write('\x3Cscript>try{Typekit.load();}catch(e){}\x3C/script>');
  };
  </script>