{"product_id":"c4-protech-carbon-fins","title":"C4 PROTECH Carbon Fins","description":"\u003cul class=\"accordion\"\u003e\n\u003cli class=\"accordion-item is-active\"\u003e\n\u003ch3 class=\"accordion-thumb\"\u003e\nDescription\u003c\/h3\u003e\n\u003cdiv class=\"accordion-panel\"\u003e\n\u003cp\u003eThe PROtech are fins designed for athletes who live freediving as a discipline of precision. They come from a scientific study of water flows, with three-dimensional geometries that follow the natural movement of the body for maximum fluidity and efficiency.\u003c\/p\u003e\n\u003cp\u003eThe foot pocket distinguishes right and left foot for a real anatomical fit: no pressure points, no energy dispersion. The structural monoblock blade–foot pocket guarantees instant thrust transmission.\u003c\/p\u003e\n\u003cp\u003eThe fins float in a controlled way thanks to lateral hydrodynamic stabilizers, maintaining trim and stability both in the pool and in depth.\u003c\/p\u003e\n\u003cp\u003eThe blades are made 100% of high-quality carbon with multilayer layering, for progressive energy release, without vibrations.\u003c\/p\u003e\n\u003cp\u003eThe result: maximum performance with a smooth, continuous and technical kick.\u003c\/p\u003e\n\u003ch4\u003eKey points\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eRight\/left anatomical foot pocket\u003c\/li\u003e\n\u003cli\u003eMonoblock blade–foot pocket\u003c\/li\u003e\n\u003cli\u003e3D hydrodynamic geometry\u003c\/li\u003e\n\u003cli\u003eControlled buoyancy\u003c\/li\u003e\n\u003cli\u003eHigh-performance multilayer carbon\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"accordion-item\"\u003e\n\u003ch3 class=\"accordion-thumb\"\u003e\nSpecifications\u003c\/h3\u003e\n\u003cdiv class=\"accordion-panel\"\u003e\n\u003cul\u003e\n\u003cli\u003eDimensions: 42\/43 = 890 x 190 mm\u003c\/li\u003e\n\u003cli\u003eBlade Material: T700 Carbon Fiber\u003c\/li\u003e\n\u003cli\u003eBlade hardness: Soft\u003c\/li\u003e\n\u003cli\u003eWater Rails Color:\t Black\u003c\/li\u003e\n\u003cli\u003eWater Rails: Rounded section water rails\u003c\/li\u003e\n\u003cli\u003eEU sizes: 36\/37 – 38\/39 – 40\/41 – 42\/43 – 44\/45\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"accordion-item\"\u003e\n\u003ch3 class=\"accordion-thumb\"\u003e\nSize Guide\u003c\/h3\u003e\n\u003cdiv class=\"accordion-panel\"\u003e\n\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/fZQ5nwzg7ok?si=SEg4WzUS4jujFW8c\" title=\"YouTube video player\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen\u003e\u003c\/iframe\u003e\n\u003ch4\u003eHow to correctly measure your foot\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003ePreparation\nPlace a blank sheet of paper against a wall and tape it down so it doesn’t move.\u003c\/li\u003e\n\u003cli\u003eMeasuring the foot length\nStand with your heel firmly against the wall. Using a marker, mark the point corresponding to your big toe (the longest toe).\u003c\/li\u003e\n\u003cli\u003eConsult the size chart\nTake the PROtech foot pocket size chart and, based on your usual shoe size, find the corresponding P.A. and P.B. values.\u003c\/li\u003e\n\u003cli\u003eMarking measurement points\nOn the sheet, starting from the big toe mark, measure and mark the distances P.A. and P.B. as indicated in the chart. Draw two lines parallel to the wall at\nthese points: they will serve as reference lines for circumference measurements.\u003c\/li\u003e\n\u003cli\u003eMeasuring the circumferences\nPlace your foot back on the sheet, heel against the wall and big toe on the mark. Using a string or tape measure, measure the foot circumference at both\npoints (first at P.A., then at P.B.) and record the results on the sheet.\u003c\/li\u003e\n\u003cli\u003eMeasuring the total length\nRemove your foot and measure the distance between the wall and the big toe mark — this is your foot length.\u003c\/li\u003e\n\u003cli\u003eComparing with the chart\nCompare the measured values with those in the PROtech size chart to identify the most accurate fit for your foot and needs.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003ePractical example:\u003cbr\u003e\nThe measurements in the first row of the table (size 36\/37) are used as a demonstration reference to illustrate the legend.\u003cbr\u003e\nLegend:\u003cbr\u003e\nL = Foot length (from heel to big toe)\u003cbr\u003e\nPA = Measurement from the big toe to determine Circumference A (7 cm back)\u003cbr\u003e\nCA = Circumference A (taken 7 cm from the big toe, around the foot)\u003cbr\u003e\nPB = Measurement from the big toe to determine Circumference B (11.5 cm back)\u003cbr\u003e\nCB = Circumference B (taken 11.5 cm from the big toe, around the foot)\u003c\/p\u003e\n\u003cp\u003eNote:\nThe circumferences refer to the shoe’s internal diameter: the foot should have a slightly larger circumference to ensure a proper fit.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"C4","offers":[{"title":"36\/37 \/ Soft","offer_id":48624540483838,"sku":"8055400193168","price":6290.0,"currency_code":"HKD","in_stock":true},{"title":"38\/39 \/ Soft","offer_id":48624540549374,"sku":"8055400193175","price":6290.0,"currency_code":"HKD","in_stock":true},{"title":"40\/41 \/ Soft","offer_id":48624540614910,"sku":"8055400193182","price":6290.0,"currency_code":"HKD","in_stock":true},{"title":"42\/43 \/ Soft","offer_id":48624540680446,"sku":"8055400193199","price":6290.0,"currency_code":"HKD","in_stock":true},{"title":"44\/45 \/ Soft","offer_id":48624540745982,"sku":"8055400194479","price":6290.0,"currency_code":"HKD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0430\/2969\/2572\/files\/C4-26-Pinne-ProTech-F_jpg.webp?v=1784651503","url":"https:\/\/freedivedepot.com\/zh\/products\/c4-protech-carbon-fins","provider":"Freedive Depot","version":"1.0","type":"link"}