{"product_id":"c4-0-5mm-open-heel-socks","title":"C4 Carbon - 0.5 mm Open Heel Socks","description":"\u003ch2\u003eC4 Carbon - 0.5 mm Open Heel Socks\u003c\/h2\u003e\n\u003cp\u003eThe \u003cstrong\u003eC4 Carbon 0.5 mm Open Heel Socks\u003c\/strong\u003e are designed to improve comfort inside freediving foot pockets without significantly changing the fit of your fins.\u003c\/p\u003e\n\u003cp\u003eMade from ultra-thin 0.5 mm neoprene, they provide a protective layer between your foot and the foot pocket, helping reduce friction, pressure points and the risk of blisters during training and open water diving.\u003c\/p\u003e\n\u003cp\u003eIdeal for freedivers who experience rubbing, pressure points or blisters inside their fin foot pockets.\u003c\/p\u003e\n\u003ch3\u003eSize guide\u003c\/h3\u003e\n\u003cp\u003eTo achieve the best comfort and fit, choose the size corresponding to your usual European shoe size:\u003c\/p\u003e\n\u003ctable\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eSize\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eEU Shoe Size\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eS\u003c\/td\u003e\n\u003ctd\u003e35–38\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eM\u003c\/td\u003e\n\u003ctd\u003e39–42\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eL\u003c\/td\u003e\n\u003ctd\u003e42–44\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eXL\u003c\/td\u003e\n\u003ctd\u003e45–47\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003cp\u003eIf you are between two sizes or are unsure about compatibility with your foot pockets, feel free to contact us before ordering.\u003c\/p\u003e\n\u003cp\u003eThese socks are designed to improve comfort and reduce friction. They are not intended to significantly increase foot pocket size.\u003cbr\u003e\u003c\/p\u003e\n\u003ch3\u003eMinimal thickness, noticeable comfort\u003c\/h3\u003e\n\u003cp\u003eMany freedivers experience discomfort not because their fins fit incorrectly, but because prolonged contact between the foot and foot pocket creates rubbing or pressure on specific areas.\u003c\/p\u003e\n\u003cp\u003eThe 0.5 mm Open Heel Socks are designed to solve this problem while maintaining the direct feel and responsiveness of your fins. Their minimal thickness allows most divers to use them without significantly altering the fit of an already well-fitting foot pocket.\u003c\/p\u003e\n\u003ch3\u003eDesigned for freediving\u003c\/h3\u003e\n\u003cp\u003eUnlike thicker neoprene socks, the 0.5 mm Open Heel Socks focus on comfort and protection rather than insulation. They provide a smooth interface between the foot and the foot pocket while maintaining excellent sensitivity and control.\u003c\/p\u003e\n\u003cp\u003eThe open heel design reduces bulk around the ankle and makes the socks easy to wear with a wide range of freediving bi-fins and monofins.\u003c\/p\u003e\n\u003ch3\u003eIdeal for training and regular use\u003c\/h3\u003e\n\u003cp\u003eWhether you train in the pool, dive from shore or spend long days in open water, small areas of friction can quickly become uncomfortable. A thin neoprene sock is one of the simplest ways to improve overall comfort during longer sessions.\u003c\/p\u003e\n\u003cp\u003eFor many freedivers, socks become a permanent part of their equipment once they experience the difference during extended training sessions.\u003c\/p\u003e\n\u003ch3\u003eMain benefits\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eUltra-thin 0.5 mm neoprene:\u003c\/strong\u003e minimal impact on fin fit\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eReduced friction:\u003c\/strong\u003e helps prevent rubbing and blisters\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eImproved comfort:\u003c\/strong\u003e especially during longer sessions\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eOpen heel design:\u003c\/strong\u003e lightweight and low bulk\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eSuitable for bi-fins and monofins:\u003c\/strong\u003e versatile compatibility\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEasy to use:\u003c\/strong\u003e simple solution for foot pocket discomfort\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eIdeal for training:\u003c\/strong\u003e pool, depth training 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\u003eProduct type\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreediving socks\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eMaterial\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eNeoprene\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eThickness\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003e0.5 mm\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eDesign\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eOpen heel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e\u003cstrong\u003eUse\u003c\/strong\u003e\u003c\/td\u003e\n\u003ctd\u003eFreediving, pool training and open water diving\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch3\u003eWhy use socks with freediving fins?\u003c\/h3\u003e\n\u003cp\u003eEven a well-fitting foot pocket can create pressure points or friction during longer training sessions. A thin 0.5 mm neoprene sock adds a protective layer between the foot and the foot pocket without significantly changing the fit.\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/kaluna-freediving.ch\/\"\u003e \u003cstrong\u003eFreediving Bi-Fins\u003c\/strong\u003e \u003c\/a\u003e : helps reduce rubbing, improve comfort and create a more secure feeling inside the foot pocket.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/kaluna-freediving.ch\/\"\u003e \u003cstrong\u003eFreediving Monofins\u003c\/strong\u003e \u003c\/a\u003e : helps prevent pressure points and creates a more comfortable connection between the foot and the monofin foot pocket.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eWho should use the 0.5 mm Open Heel Socks?\u003c\/h3\u003e\n\u003cp\u003eThese socks are ideal for freedivers who already have reasonably well-fitting foot pockets but want additional comfort and protection. They are particularly useful for divers who experience friction, hot spots or blisters during longer sessions.\u003c\/p\u003e\n\u003cp\u003eBecause of their minimal thickness, they are also a good choice for divers who do not want to significantly change the fit of their fins.\u003c\/p\u003e\n\u003ch3\u003eKaluna Freediving Opinion\u003c\/h3\u003e\n\u003cp\u003eMany freedivers ignore socks until they start experiencing discomfort in their foot pockets. Once rubbing, pressure points or blisters appear, a good pair of thin neoprene socks can make a surprisingly large difference.\u003c\/p\u003e\n\u003cp\u003eThe advantage of a 0.5 mm sock is that it improves comfort without significantly changing the fit of your fins. This makes it particularly useful for divers who already have a well-fitting foot pocket but want a little extra protection.\u003c\/p\u003e\n\u003cp\u003eIf your fins are noticeably too large, a thicker sock may be a better solution. If your foot pockets already fit well and you simply want more comfort during longer training sessions, the 0.5 mm Open Heel Sock is exactly the type of accessory that can make a difference without adding unnecessary bulk.\u003c\/p\u003e","brand":"C4 Carbon","offers":[{"title":"S","offer_id":56944470557050,"sku":null,"price":33.0,"currency_code":"CHF","in_stock":false},{"title":"M","offer_id":56944470589818,"sku":null,"price":33.0,"currency_code":"CHF","in_stock":false},{"title":"L","offer_id":56944470622586,"sku":null,"price":33.0,"currency_code":"CHF","in_stock":false},{"title":"XL","offer_id":56944470655354,"sku":null,"price":33.0,"currency_code":"CHF","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0079\/0157\/7306\/files\/c4-carbon-0-5mm-open-heel-socks.webp?v=1780567383","url":"https:\/\/kaluna-freediving.ch\/en\/products\/c4-0-5mm-open-heel-socks","provider":"Kaluna Freediving","version":"1.0","type":"link"}