Hi
Open up sf-header.php and find line 714:
$cart_output .= '<li class="parent shopping-bag-item"><a class="cart-contents" href="'.$woocommerce->cart->get_cart_url().'" title="'.__("View your shopping cart", "swiftframework").'"><i class="sf-cart"></i>'.$cart_total.'</a>';
You will need to replace sf-cart
– Kyle