Gear up and get ready for the next freediving travel and training evolution.
The CORE Silicone Bifins are the ideal training fins for all levels of freedivers, whether the objective is to develop symmetrical kicking technique or to perfect it. Having specific training fins helps freedivers concentrate on forming the perfect foundation of technique, which will optimize efficiency later on in performances with longer blades.
The CORE Silicone Bifins uses a special grade of silicone, ensuring a comfortable fit and efficient operation in any water temperature. The unique design is inspired by the CB2 Carbon: the blade shape, foot pocket, arch support, and the open heel. All were created to provide the highest level of efficiency with minimal effort, whether they are used for distance in the pool or for depth in open water.
The CORE Silicone Bifins material is hypoallergenic and UV-resistant with the Molchanovs minimalistic design. They are able to accommodate both narrow and wide feet due to the flexibility of the silicone. The arch support keeps feet in the optimal position during kick cycles to provide maximum efficiency, while the open-heel design is anatomically designed to for a comfortable fit. The blade features eight stabilizing rails with a specific curvature profile and stiffness distribution, making the CORE Silicone Bifins more efficient with the least amount of effort.
Whether you are a beginner or a competitive freediver, an instructor teaching a course, or an underwater photographer capturing the fun, the CORE Silicone Bifins belong in your gear bag.
Hypoallergenic and UV-resistant silicone
Designed for all water temperatures
Can withstand -30°C temperatures without deforming
Arch support maintains correct position of the foot during the kick stroke for maximum efficiency
Open-heel foot pocket provides the optimal foot position for swimming
Anatomical shape of the back strap designed for better fit over the Achilles tendon and offer maximum support
Eight blade rails with specific curvature profile and stiffness distribution similar to the CB2, making them more efficient and stable with the least amount of effort
Molchanovs minimalistic design
Total Length: 58cm / 22.8in (depending on foot pocket size)
Blade Length: 30cm / 11.8in (from the angle of the blade to the tip)
Blade Width: 20cm / 7.9in
Weight (one pair of fins): 1.6-1.8kg (3.5-4lb)
Colors: Black, Blue, White
Shipping Fees and Timing
Breathe deeply - here are the answers to your most urgent shipping questions.
COVID-19: Please note that due to COVID-19, postal services have been affected and courier prices have increased. To serve you better, we have sourced the lowest cost shipping possible during these times. However, circumstances are such that sometimes deliveries take longer than usual. In general, the estimated delivery time for standard shipping now takes 2 - 5 weeks. However, as the COVID-19 pandemic continues, delays up to 8 weeks are expected to happen worldwide depending on local couriers and the availability of international flights to specific countries.
What is the estimated delivery cost?
We ship worldwide to most countries by flat shipping rates depending on the destination as follows:
Rate in USD
South Asia, East Asia, Southeast Asia, and the Pacific (including Australia and New Zealand)
Europe and North America (including Canada and Mexico)
North Asia, Central Asia, and Western Asia (including the Middle East)
Central America, South America, the Caribbean, and Africa
What is the estimated delivery time?
The estimated delivery time for standard shipping usually falls within 2 - 5 weeks from dispatch depending on your shipping location. We will send you an email once your order has been processed and handed over to the EMS mail service. There may be delays at your local customs office on arrival, so please check your tracking number regularly.
When will my order ship?
Shipping times begin when your item(s) have left one of our distribution centers in Moscow, Russia, Singapore, China, or the US. For items that are ready for you at our distribution centre (e.g. lanyard, nose clip, buoy, fin bags, standard size fins), please allow 2-5 days business days for processing before your order is shipped.
For our custom-made items, production times are as follows:
1The usual production time of bifins is 4-6 weeks, however, due to a recent high volume of orders, production times have been temporarily increased to 10-12 weeks. We are currently working to increase our production capacity and appreciate your understanding.
2The usual production time of PRO Monofin 4 is 4-6 weeks, however, due to a recent high volume of orders, production time of PRO Monofin 4 Carbon have been temporarily increased to 10-12 weeks. We are currently working to increase our production capacity and appreciate your understanding.
If you want to order a custom item but need it urgently, you can ask for a priority production free of charge (depending on availability), which takes 10-14 days. Please contact us by e-mail at email@example.com to see if priority shipping is currently available for your selected time frame.
Do I have to pax taxes for my purchase?
Please note that import duties and taxes may be applied by your local authority. It is a legal requirement that we declare the full transaction value of the contents of all packages. Local import duties and taxes are levied by the carrier on behalf of the local customs authority. Molchanovs is not liable for any local import duties or taxes.
If you have any more questions, feel free to contact us at firstname.lastname@example.org and you will receive a reply within 1-2 business days. If you have not heard back from us after 2 days, please check your spam folder.
Can I return my item(s)?
Not quite right? No problem! We have a 30-day return policy. If you are not 100% satisfied with your item(s), return it within 30 days of receiving your order in salable condition for a refund or exchange. Please return your item(s) in the original packaging.
If your item is outside of the 30-day return window, refer to our Warranty Policy for more information.
Note on swimwear: Due to swimwear being an intimate item, some pieces contain a protective sticker to keep the fabric from coming into direct contact with the skin in order to preserve hygiene. Please try on the swimsuit with the hygiene sticker still attached; if you are not 100% satisfied with the fit, you can return it within 30 days of receiving your order. We will not accept returns with the hygiene sticker removed.
What if the packaging of my item is damaged?
Please check your package upon receiving. If you detect any damage that may have been caused during transportation, open the package in the presence of the postal employee. In the event of damage to the product, the postal worker is obliged to draw up a statement and sign it. For more information regarding further action, immediately contact us at email@example.com.
Are all items refundable?
Gift cards, sale items, swimwear without the hygiene sticker attached, and custom-made wetsuits are non-refundable. Custom-made fins (monofin and bifins) are refundable for up to 80% of purchase price depending on the degree of customization. There are certain situations where only a partial refund (or no refund at all) can be granted for other returned items, including standard items. This is the case if an item is not in its original condition, damaged, missing parts upon return, or is returned more than 30 days after delivery.
Are shipping costs refundable?
Please note that we can not refund the shipping costs for your purchase or your return. If the refund is due to a faulty item, shipping and return costs are on us.
When do I get my refund?
Once your return is received and inspected, we will send you an email to notify you that we have received your returned item. We will also notify you of the approval or rejection of your refund. If you are approved, your refund will be processed and a credit will automatically be applied to your credit card or original method of payment within 5 business days. If you have not received your refund within 5 business days of our notification, please contact your bank. If your bank cannot find this transaction, please contact us at firstname.lastname@example.org.
What if an item is faulty?
If you think your product has suffered a manufacturing fault, you have received a wrong item, or an item is missing, please contact us at email@example.com within 7 days of receiving your order. Items that are damaged due to excessive or long-term use are not considered faulty.
How do I mail the return back to you?
Please take your item(s) to your local post office at your own cost. We request that you acquire a proof of postage receipt and retain this until you receive an email confirmation that we have received your return and are processing it. Without a return tracking number, we may not be able to honor your return if it becomes lost in transit. We do not refund postage costs.
If you have more questions, feel free to contact us at firstname.lastname@example.org and you will receive a reply within 1-2 days. If you have not heard back from us after 2 days, please check your spam folder.