{"product_id":"c4-protech-freediving-fins","title":"C4 Carbon - Protech Freediving Fins","description":"\u003ch2\u003eC4 Carbon - Protech Freediving Fins\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eC4 Carbon Protech Freediving Fins\u003c\/strong\u003e combine lightweight T700 carbon fiber blades with C4's proven foot pocket technology, creating a versatile fin for training, depth sessions and regular open water freediving.\u003c\/p\u003e\n\u003cp\u003eDesigned around a medium-soft blade response, the Protech offers an efficient balance between comfort, propulsion and usability. Whether you are building experience in the water or looking for a reliable carbon fin for frequent training, the Protech delivers performance without feeling overly demanding.\u003c\/p\u003e\n\u003ch3\u003eEfficient carbon performance for everyday freediving\u003c\/h3\u003e\n\u003cp\u003eMany carbon fins are designed with maximum stiffness and specialized competition use in mind. The Protech takes a more versatile approach.\u003c\/p\u003e\n\u003cp\u003eIts T700 carbon fiber blade provides excellent energy transfer while maintaining a smooth and forgiving response throughout the kick cycle. This makes the fin suitable for a wide range of diving styles, from recreational depth training to more advanced open water sessions.\u003c\/p\u003e\n\u003ch3\u003eBuilt around the proven C4 foot pocket system\u003c\/h3\u003e\n\u003cp\u003eThe Protech uses C4's modern foot pocket design, developed to maximize comfort while minimizing energy loss between the foot and blade. Efficient power transfer and a secure fit help improve overall fin efficiency without compromising comfort during longer dives and training sessions.\u003c\/p\u003e\n\u003cp\u003eCombined with the medium-soft carbon blade, the result is a fin that feels responsive, predictable and comfortable across a wide range of conditions.\u003c\/p\u003e\n\u003ch3\u003eDesigned for training and open water use\u003c\/h3\u003e\n\u003cp\u003eThe Protech is particularly attractive for freedivers looking for a carbon fin that can be used regularly rather than only on special occasions. The balanced blade characteristics make it suitable for depth training, open water sessions and general freediving practice.\u003c\/p\u003e\n\u003cp\u003eIts forgiving nature also makes it accessible to divers transitioning from polymer fins into their first carbon fin setup.\u003c\/p\u003e\n\u003ch3\u003eMain benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eT700 carbon fiber blades:\u003c\/strong\u003e lightweight and efficient energy transfer\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eMedium-soft stiffness:\u003c\/strong\u003e comfortable and versatile blade response\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eC4 foot pocket technology:\u003c\/strong\u003e efficient power transfer and comfort\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003e29° blade angle:\u003c\/strong\u003e optimized hydrodynamics and kicking efficiency\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRounded water rails:\u003c\/strong\u003e improved water channeling along the blade\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for a wide range of divers:\u003c\/strong\u003e from progressing freedivers to experienced athletes\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eExcellent all-round performance:\u003c\/strong\u003e training, depth sessions and open water use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eTechnical details\u003c\/h3\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBrand\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eC4 Carbon\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eModel\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eProtech\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eProduct type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreediving fins\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDimensions\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eComplete fin (size 42\/43): 890 × 190 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade material\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eT700 Carbon Fiber\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade stiffness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eMedium \/ Soft\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eBlade angle\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e29°\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWeight\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eApprox. 790 g per fin\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater rails\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eRounded section water rails\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eWater rail color\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eBlack\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreediving training, depth sessions and open water diving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003e\u003c\/h3\u003e\n\u003ch3\u003eRecommended accessories\u003c\/h3\u003e\n\u003cp\u003eFor maximum comfort and performance, we recommend pairing the Protech fins with suitable neoprene socks or toe protectors.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/kaluna-freediving.ch\/\"\u003e \u003cstrong\u003e0.5 mm Open Heel Neoprene Socks\u003c\/strong\u003e \u003c\/a\u003e : additional comfort and protection during longer training sessions.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/kaluna-freediving.ch\/\"\u003e \u003cstrong\u003e0.5 mm Toe Protector\u003c\/strong\u003e \u003c\/a\u003e : ideal for warm water and reducing friction inside the foot pocket.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/kaluna-freediving.ch\/\"\u003e \u003cstrong\u003e1.5 mm Toe Protector\u003c\/strong\u003e \u003c\/a\u003e : extra protection and improved fit in cooler conditions.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho should use the C4 Protech?\u003c\/h3\u003e\n\u003cp\u003eThe Protech is an excellent option for freedivers looking for a versatile carbon fin with a comfortable and forgiving blade response. It is suitable for divers progressing from entry-level equipment as well as experienced freedivers looking for a reliable everyday carbon fin.\u003c\/p\u003e\n\u003cp\u003eIts medium-soft setup makes it especially attractive for divers who prioritize efficiency and comfort over extremely stiff competition-oriented blades.\u003c\/p\u003e\n\u003ch3\u003eAvailability\u003c\/h3\u003e\n\u003cp\u003eThe C4 Protech is available in multiple foot pocket sizes.\u003c\/p\u003e\n\u003cp\u003eTo provide access to the complete size range, not every size is permanently stocked at our warehouse. Please contact us if you would like to confirm current availability before ordering.\u003c\/p\u003e\n\u003cp\u003eIf your preferred size is not immediately available, the typical delivery time is approximately 7–14 days.\u003c\/p\u003e\n\u003ch3\u003eExternal Apnea Passion review\u003c\/h3\u003e\n\u003cp\u003eThe C4 Protech was independently reviewed by \u003ca rel=\"noopener noreferrer\" href=\"https:\/\/apneapassion.com\/equipment\/dossier-and-xrays\/c4-protech-competition-fins\/\" target=\"_blank\"\u003e Apnea Passion \u003c\/a\u003e, who highlighted its balance of comfort, efficiency and overall versatility.\u003c\/p\u003e\n\u003ch3\u003eKaluna Freediving Opinion\u003c\/h3\u003e\n\u003cp\u003eMany carbon fins are designed with maximum performance as the primary goal. The Protech takes a slightly different approach.\u003c\/p\u003e\n\u003cp\u003eInstead of focusing purely on extreme stiffness or specialized competition use, the Protech combines the efficiency of T700 carbon blades with a forgiving and versatile Medium\/Soft setup. This makes it accessible to a wider range of freedivers while still delivering the responsiveness that makes carbon fins so popular.\u003c\/p\u003e\n\u003cp\u003eFor many freedivers, the Protech hits a sweet spot between performance, comfort and usability. It is suitable for regular training, depth sessions and open water diving without feeling overly demanding or technical.\u003c\/p\u003e\n\u003cp\u003eIf you are looking for an ultra-stiff competition fin, there are more specialized options available. If you want a carbon fin that performs well across a wide range of conditions and experience levels, the Protech is a very compelling choice.\u003c\/p\u003e","brand":"C4 Carbon","offers":[{"title":"36\/37","offer_id":56944395354490,"sku":null,"price":625.0,"currency_code":"CHF","in_stock":true},{"title":"38\/39","offer_id":56944395387258,"sku":null,"price":625.0,"currency_code":"CHF","in_stock":true},{"title":"40\/41","offer_id":56944395420026,"sku":null,"price":625.0,"currency_code":"CHF","in_stock":true},{"title":"42\/43","offer_id":56944395452794,"sku":null,"price":625.0,"currency_code":"CHF","in_stock":true},{"title":"44\/45","offer_id":56944395485562,"sku":null,"price":625.0,"currency_code":"CHF","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/0157\/7306\/files\/c4-carbon-protech-freediving-fins-pair-front.webp?v=1780566853","url":"https:\/\/kaluna-freediving.ch\/en\/products\/c4-protech-freediving-fins","provider":"Kaluna Freediving","version":"1.0","type":"link"}