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45-46","offer_id":46821780422915,"sku":null,"price":64.95,"currency_code":"USD","in_stock":false},{"title":"White \/ 47-48","offer_id":46821780455683,"sku":null,"price":67.95,"currency_code":"USD","in_stock":false},{"title":"White \/ 49-50","offer_id":46821780488451,"sku":null,"price":67.95,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/0388\/3267\/files\/2_34137bf4-952b-4326-a633-695d635eed4e.png?v=1757470888"},{"product_id":"h-dessault-technopolymer-hd-maxx-plastic-fin-blades-only","title":"H. Dessault Technopolymer HD Maxx Plastic Fin - Blades Only","description":"\u003cp\u003eTo achieve softness, high elastic return and strong breakage resistance, the design and material of the blade are very important features. We have therefore selected and tested a multitude of polymers and we have finally chosen a medium\/soft hardness compound suitable for both spearfishing and freediving. This choice guarantees extremely high performance and resistance\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe HD MAXX fins are by far among the lightest fins with long polymer blades. The weight is less than 1300 grams per pair.\u003c\/p\u003e","brand":"American Dive Co.","offers":[{"title":"Default Title","offer_id":47729996857603,"sku":null,"price":59.95,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/0388\/3267\/files\/HD_23_Pala-HD-Technopolimero-F-1000px-200x200_2000x_b23cc481-e8de-4230-a044-f8336a182b92.webp?v=1770761387"},{"product_id":"h-dessault-technopolymer-hd-maxx-plastic-fins-complete","title":"H. Dessault Technopolymer HD Maxx Plastic Fins - Complete","description":"\u003cp\u003eThanks to the use of a TPE 75 ShA polymer, the energy transmission of the 350 footpocket to the blade is increased, thus obtaining highly efficient fins \u003cbr\u003e\u003c\/p\u003e\n\u003cp\u003eThe study of the geometries has allowed us to obtain minimum thicknesses, allowing the weight of the 350 footpocket in size 41\/42 to be reduced to just 350 grams\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe reduced mass (weight) of the 350 footpockets, optimizes the use the energy needed for the movement, allowing the diver to save energy and thus reducing muscle fatigue\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eTo achieve softness, high elastic return and strong breakage resistance, the design and material of the blade are very important features. We have therefore selected and tested a multitude of polymers and we have finally chosen a medium\/soft hardness compound suitable for both spearfishing and freediving. This choice guarantees extremely high performance and resistance\u003cspan class=\"Apple-converted-space\"\u003e \u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003eThe HD MAXX fins are by far among the lightest fins with long polymer blades. The weight is less than 1300 grams per pair\u003c\/p\u003e","brand":"American Dive Co.","offers":[{"title":"36-37","offer_id":47730860228867,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false},{"title":"38-39","offer_id":47730860261635,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false},{"title":"40-41","offer_id":47730860294403,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false},{"title":"42-43","offer_id":47730860327171,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false},{"title":"44-45","offer_id":47730860359939,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false},{"title":"46-47","offer_id":47730860392707,"sku":null,"price":149.99,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/0388\/3267\/files\/dessaultplasticfins_2000x_cf2fa95b-9d1d-48f1-8cc8-ba45e6d64242.webp?v=1770761997"},{"product_id":"c4-umberto-pelizzari-fbg-fiberglass-blades","title":"C4 Umberto Pelizzari FBG - Fiberglass Blades","description":"\u003cp class=\"p1\"\u003e\u003cb\u003eFootpockets Sold Separately \u003c\/b\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eFrom the collaboration with Umberto Pelizzari, a global freediving icon, and backed by over thirty years of experience in designing high-performance fins, the new FBG Umberto Pelizzari line is born.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eEntirely designed and manufactured by C4, these fins represent a perfect balance of technology, efficiency and accessibility.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eThe FBG Umberto Pelizzari fins are made with\u003cspan\u003e \u003c\/span\u003e\u003cb\u003e100% fiberglass blades\u003c\/b\u003e, laminated using the same structure as our top carbon models.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eThey are paired with the innovative C4 250 footpockets to ensure top-level comfort and energy transfer.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e(Also Compatible with H.Dessault 350 footpockets)\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eHigh and long-lasting performance with an exceptional quality-to-price ratio.\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eAvailable in three stiffness levels:\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e20 Extra Soft\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e25 Soft\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003e30 Medium\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eDesigned to meet the needs of freedivers and spearfishers\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eHigh performance at a competitive price\u003c\/span\u003e\u003c\/p\u003e\n\u003cp class=\"p1\"\u003e\u003cspan class=\"s1\"\u003eSuitable for all levels, from beginner to expert\u003c\/span\u003e\u003c\/p\u003e","brand":"American Dive Co.","offers":[{"title":"Black \/ 20 Extra Soft","offer_id":48296122843395,"sku":null,"price":180.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 25 Soft","offer_id":48296122876163,"sku":null,"price":180.0,"currency_code":"USD","in_stock":true},{"title":"Black \/ 30 Medium","offer_id":48296122908931,"sku":null,"price":180.0,"currency_code":"USD","in_stock":false},{"title":"White \/ 20 Extra Soft","offer_id":48296122941699,"sku":null,"price":180.0,"currency_code":"USD","in_stock":true},{"title":"White \/ 25 Soft","offer_id":48296122974467,"sku":null,"price":180.0,"currency_code":"USD","in_stock":false},{"title":"White \/ 30 Medium","offer_id":48296123007235,"sku":null,"price":180.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0704\/0388\/3267\/files\/C4-25-FBG-Pinna-nera-fronte_2000x_607d4960-1dd7-4f6a-b1ae-b55a6546bf5e.webp?v=1780337474"},{"product_id":"h-dessault-by-c4-350-footpocket","title":"H. 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If you need footpockets for these blades, please be sure to add them to your cart. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eThe CETMA MANTRA Carbon Fin Blade has been specifically engineered for either the CETMA S-Wing Footpockets or the Pathos Fireblade Footpockets. \u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eCarbon Fiber Blades MANTRA key features:\u003c\/p\u003e\n\u003cp\u003e1) 100% IM7 carbon fibre.\u003c\/p\u003e\n\u003cp\u003e2) The material used is 100 % Carbon Prepreg produced with hot melt impregnation system, using a micro-toughened tetra-functional epoxy resin. \u003c\/p\u003e\n\u003cp\u003e3) 3D-Tech: Proprietary Technology, of CETMA COMPOSITES exclusive know-how, with high pressure, high temperature and high degree of applied vacuum, which lead to a component with 0% void level, without defects, with a uniform matrix\/reinforcement ratio across the whole blade. \u003c\/p\u003e\n\u003cp\u003e4) FEM Design: MANTRA blades are optimized trough an accurate Design by means of Finite Element Softwares (FEM). The Design trough FEM software allows an optimized distribution of the stiffness, with the aim to obtain a deformation ensuring the maximum hydrodynamic efficiency.\u003c\/p\u003e\n\u003cp\u003e5) Signature model: developed in collaboration with the world champion CWT bi fins Michele Giurgola.\u003c\/p\u003e\n\u003cp\u003e6) DRS (Dynamic Resonance System) innovative and exclusive CETMA COMPOSITES system. DRS implies that MANTRA blades were designed to reach in resonance in a definite frequency of kick. Resonance phenomenon is well note physical phenomenon characterizing all the structures. Simplifying, when a structure is forced with a frequency close to its natural frequency the amplitude of vibration increase in a very efficiency way (low damping). Operating by distribution of the stiffness along the blade we “tuned” the blades to certain natural frequencies. So when the blade is driven, by kicking, with a certain frequencies range the user feeling is a very low effort with an outrageous thrust. This study is done using a laser vibrometer (LDV) to perform a modal analysis, which helps in a stiffness distribution design of the blade.\u003c\/p\u003e\n\u003cp\u003e7) Dimensions: Width 195 mm; Length from the bending angle 742 mm; bending angle 33 degrees.\u003c\/p\u003e\n\u003cp\u003e8) Available stiffness: super soft (XS), soft (S), medium (M), Hard (H)\u003c\/p\u003e\n\u003cp\u003e9) Color choice: White, Gold, Magenta.\u003c\/p\u003e\n\u003cp\u003e10) Footpocket fitting: CETMA COMPOSITES, SpearPro and Pathos.\u003c\/p\u003e\n\u003cp\u003e11) Water rail: CETMA COMPOSITES Water rails with variable height and high efficiency.\u003c\/p\u003e\n\u003cp\u003e12) Warranty: 2 years on carbon parts; 5 years if fitted with CETMA COMPOSITES footpocket.\u003c\/p\u003e","brand":"American Dive Co.","offers":[{"title":"Blue \/ Extra Soft","offer_id":48319101534467,"sku":null,"price":529.95,"currency_code":"USD","in_stock":false},{"title":"Blue \/ 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