{"product_id":"sa-mastery-mpx-freshwater-floating-fly-line-buckskin-optic-green","title":"SA Mastery MPX Freshwater Floating Fly Line Buckskin\/Optic Green","description":"\u003cp\u003eFor years, the gold standard in the Scientific Anglers lineup was the GPX taper. From tossing small dries to slinging huge streamers, the GPX could do it all. But all good things must come to an end. Built a half-size heavy, the MPX taper starts where the GPX left off. Redesigned with more mass toward the front of the head, the MPX provides the same benefits of the GPX, with an added emphasis on presentation. The power is still there, only with an added bit of finesse. Meet your new best friend and the best all-around fly line we’ve ever made.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eThe ultimate general presentation taper\u003c\/li\u003e\n\u003cli\u003eImproved version of our GPX taper\u003c\/li\u003e\n\u003cli\u003eBuilt a half-size heavy to load rods and turn over large flies easily\u003c\/li\u003e\n\u003cli\u003eExcellent with dry flies, nymphs, and streamers\u003c\/li\u003e\n\u003cli\u003eFeatures AST slickness additive\u003c\/li\u003e\n\u003cli\u003eFor use in moderate and cold climates\u003c\/li\u003e\n\u003cli\u003eBraided multifilament core\u003c\/li\u003e\n\u003cli\u003eSA ID – \u003cstrong\u003eSA MS MPX WF X F\u003c\/strong\u003e (X = line weight\n\u003cdiv class=\"wail-attr\"\u003e\n\u003cdiv class=\"wail-label\"\u003e\u003c\/div\u003e\n\u003cdiv class=\"wail-label\"\u003eTechnology\u003c\/div\u003e\n\u003cdiv class=\"wail-values\"\u003e\n\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/ast.jpg\" alt=\"AST\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/sa-id.jpg\" alt=\"SA Line ID\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/welded-loops.jpg\" alt=\"Welded Loops\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wail-attr\"\u003e\n\u003cdiv class=\"wail-label\"\u003eWater Temp\u003c\/div\u003e\n\u003cdiv class=\"wail-values\"\u003e\n\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/10\/cold.jpg\" alt=\"Cold\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/10\/medium.jpg\" alt=\"Medium\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wail-attr\"\u003e\n\u003cdiv class=\"wail-label\"\u003eWater Type\u003c\/div\u003e\n\u003cdiv class=\"wail-values\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/10\/freshwater.jpg\" alt=\"Freshwater\" loading=\"lazy\"\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wail-attr\"\u003e\n\u003cdiv class=\"wail-label\"\u003eFishing Type\u003c\/div\u003e\n\u003cdiv class=\"wail-values\"\u003e\n\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/streamers.jpg\" alt=\"Streamers\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/nymphs.jpg\" alt=\"Nymphs\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/dries.jpg\" alt=\"Dries\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/indicator.jpg\" alt=\"Indicators\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/poppers.jpg\" alt=\"Poppers\/Big Dries\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"wail-attr\"\u003e\n\u003cdiv class=\"wail-label\"\u003eSpecies\u003c\/div\u003e\n\u003cdiv class=\"wail-values\"\u003e\n\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/trout.jpg\" alt=\"Trout\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/bass.jpg\" alt=\"Bass\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/grayling.jpg\" alt=\"Grayling\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/panfish.jpg\" alt=\"Panfish\" loading=\"lazy\"\u003e\u003cimg class=\"wail-icon\" src=\"https:\/\/scientificanglers.com\/wp-content\/uploads\/2025\/08\/carp.jpg\" alt=\"Carp\" loading=\"lazy\"\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e \u003c\/p\u003e","brand":"Scientific Anglers","offers":[{"title":"4wt","offer_id":47963733590100,"sku":null,"price":79.95,"currency_code":"USD","in_stock":true},{"title":"5wt","offer_id":47963733622868,"sku":null,"price":79.95,"currency_code":"USD","in_stock":true},{"title":"6wt","offer_id":47963733655636,"sku":null,"price":79.95,"currency_code":"USD","in_stock":true},{"title":"7wt","offer_id":47963733688404,"sku":null,"price":79.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0626\/1650\/2356\/files\/mastery-mpx.jpg?v=1793039456","url":"https:\/\/thesouthernoutfitter.com\/products\/sa-mastery-mpx-freshwater-floating-fly-line-buckskin-optic-green","provider":"The Southern Outfitter","version":"1.0","type":"link"}