{"product_id":"pinne-in-carbonio-c4-s-990-firestone","title":"S-990 Firestone Fins","description":"\u003ch2\u003eS-990 Firestone Fins in 100% Carbon - 200 Line C4\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eS-990 Firestone\u003c\/strong\u003e are an advanced solution for freediving and spearfishing, made from \u003cstrong\u003e100% carbon\u003c\/strong\u003e and part of C4’s \u003cstrong\u003e200 line\u003c\/strong\u003e, designed to deliver an optimal combination of lightness, responsiveness, and mechanical strength.\u003c\/p\u003e\n\n\u003ch3\u003eStructure and Materials\u003c\/h3\u003e\n\u003cp\u003eThe blade features a \u003cstrong\u003eprogressive lamination\u003c\/strong\u003e of \u003cstrong\u003e4 different types of Japanese carbon\u003c\/strong\u003e, arranged in \u003cstrong\u003e7 unidirectional layers\u003c\/strong\u003e. This technical construction allows for excellent optimization of thrust transmission and blade durability.\u003c\/p\u003e\n\u003cp\u003eThe blade tip is shaped with a \u003cstrong\u003eswallowtail\u003c\/strong\u003e profile, a design that improves finning fluidity and hydrodynamics, reducing water resistance during freediving movement.\u003c\/p\u003e\n\n\u003ch3\u003eWater Rails and Protection\u003c\/h3\u003e\n\u003cp\u003eThe \u003cstrong\u003ewater rails\u003c\/strong\u003e are integrated through bonding and high-pressure, high-temperature overmolding, a process that fuses the polymer with the blade’s carbon composite, eliminating the risk of detachment during dives.\u003c\/p\u003e\n\u003cp\u003eThe \u003cstrong\u003evariable geometry\u003c\/strong\u003e of the water rails has been engineered to:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003eProtect the blade in the area adjacent to the foot\u003c\/li\u003e\n  \u003cli\u003eMinimize load losses along the entire length of the blade\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch3\u003eFoot Pocket and Sizes\u003c\/h3\u003e\n\u003cp\u003eThe fins are fitted with the \u003cstrong\u003e200 foot pocket\u003c\/strong\u003e, made with a black \u003cstrong\u003ethermoplastic elastomer\u003c\/strong\u003e upper and a red \u003cstrong\u003epolypropylene\u003c\/strong\u003e sole, designed to ensure comfort, fit, and durability in the water.\u003c\/p\u003e\n\u003cp\u003eThe blade dimensions are \u003cstrong\u003e770 x 192 mm\u003c\/strong\u003e, optimized to ensure efficiency and control during finning.\u003c\/p\u003e\n\n\u003ch3\u003eStiffnesses and Available Sizes\u003c\/h3\u003e\n\u003cp\u003eThe S-990 Firestone fins are available in three stiffness levels to suit different thrust and control needs in freediving:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e\u003cstrong\u003e25 Soft\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003e30 Medium\u003c\/strong\u003e\u003c\/li\u003e\n  \u003cli\u003e\u003cstrong\u003e40 Hard\u003c\/strong\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003eThe sizes cover a wide range:\u003c\/p\u003e\n\u003cul\u003e\n  \u003cli\u003e36\/37\u003c\/li\u003e\n  \u003cli\u003e38\/39\u003c\/li\u003e\n  \u003cli\u003e40\/41\u003c\/li\u003e\n  \u003cli\u003e41\/42\u003c\/li\u003e\n  \u003cli\u003e42\/43\u003c\/li\u003e\n  \u003cli\u003e43\/44\u003c\/li\u003e\n  \u003cli\u003e44\/45\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"C4","offers":[{"title":"25 - Soft \/ 36-37","offer_id":56926635688281,"sku":"0SC4200R36 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 38-39","offer_id":56926635786585,"sku":"0SC4200R38 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 40-41","offer_id":56926635884889,"sku":"0SC4200R40 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 41-42","offer_id":56926635983193,"sku":"0SC4200R41 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 42-43","offer_id":56926636081497,"sku":"0SC4200R42 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 43-44","offer_id":56926636179801,"sku":"0SC4200R43 + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"25 - Soft \/ 44-45","offer_id":56926636278105,"sku":"0SC4200R44  + 0BC4L1090F25","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 36-37","offer_id":56926635721049,"sku":"0SC4200R36 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 38-39","offer_id":56926635819353,"sku":"0SC4200R38 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 40-41","offer_id":56926635917657,"sku":"0SC4200R40 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 41-42","offer_id":56926636015961,"sku":"0SC4200R41 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 42-43","offer_id":56926636114265,"sku":"0SC4200R42 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 43-44","offer_id":56926636212569,"sku":"0SC4200R43 + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"30 - Medium \/ 44-45","offer_id":56926636310873,"sku":"0SC4200R44  + 0BC4L1090F30","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 36-37","offer_id":56926635753817,"sku":"0SC4200R36 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 38-39","offer_id":56926635852121,"sku":"0SC4200R38 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 40-41","offer_id":56926635950425,"sku":"0SC4200R40 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 41-42","offer_id":56926636048729,"sku":"0SC4200R41 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 42-43","offer_id":56926636147033,"sku":"0SC4200R42 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 43-44","offer_id":56926636245337,"sku":"0SC4200R43 + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true},{"title":"40 - Hard \/ 44-45","offer_id":56926636343641,"sku":"0SC4200R44  + 0BC4L1090F40","price":518.0,"currency_code":"EUR","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0993\/6732\/1945\/files\/Pinne_S-990_Firestone.png?v=1782067526","url":"https:\/\/deepbluesub.com\/en\/products\/c4-s-990-firestone-carbon-fins","provider":"DEEP BLUE - Freediving \u0026 Spearfishing","version":"1.0","type":"link"}