CSS Minification
Your page having 38 external css files and out of them 20 css files are minified.
Following files are not minified :
//fonts.googleapis.com/css?family=Raleway:100,200,300,400,500,600,700,800,900,300italic,400italic,700italic|Raleway:100,200,300,400,500,600,700,800,900,300italic,400italic,700italic|Berkshire+Swash:100,200,300,400,500,600,700,800,900,300italic,400italic,700italic|Lora:100,200,300,400,500,600,700,800,900,300italic,400italic,700italic|Source+Sans+Pro:100,200,300,400,500,600,700,800,900,300italic,400italic,700italic&subset=latin,latin-ext
https://perthshirekilts.com/wp-content/plugins/LayerSlider/static/css/layerslider.css?ver=5.6.9
https://perthshirekilts.com/wp-content/uploads/layerslider.custom.css?ver=5.6.9
https://fonts.googleapis.com/css?family=Lato:100,300,regular,700,900%7COpen+Sans:300%7CIndie+Flower:regular%7COswald:300,regular,700&subset=latin%2Clatin-ext
https://perthshirekilts.com/wp-content/plugins/accordion-pro/assets/css/bootstrap-front.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/plugins/accordion-pro/assets/css/animate.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/plugins/mappress-google-maps-for-wordpress/css/mappress.css?ver=2.53.3
https://perthshirekilts.com/wp-content/plugins/revslider/public/assets/css/settings.css?ver=5.4.8.3
https://perthshirekilts.com/wp-content/themes/bridge/style.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/themes/bridge/css/linea-icons/style.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/themes/bridge/css/dripicons/dripicons.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/themes/bridge/css/print.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/themes/bridge/css/style_dynamic.css?ver=1577466163
https://perthshirekilts.com/wp-content/themes/bridge/css/style_dynamic_responsive.css?ver=1577466163
https://perthshirekilts.com/wp-content/themes/bridge/css/custom_css.css?ver=1577466163
https://perthshirekilts.com/wp-content/themes/bridge-child/style.css?ver=c846ee11427f870b973bac2a376e7f88
https://perthshirekilts.com/wp-content/plugins/share-this-image/assets/css/sti.css?ver=1.27
https://perthshirekilts.com/?wpcss_action=show_css