Mares Quattro 4X Open Heel Fins

$409.95

The name says it all. The Mares Avanti Quattro 4X Fins are the evolution of an icon – built to honor the legendary Quattro while pushing performance further. The Mares Avanti QUATTRO 4X is the next-generation open-heel fin, combining comfort, power, and control. With a three-material blade, optimized foot pocket, and 4-channel thrust system, it delivers efficient propulsion and all-day comfort. Features include stabilizing ribs, bungee strap, anatomical heel pad, and a reusable mesh bag. Available in sizes XS to XL. Designed for all dive styles.

Mares Fins Size Chart

Description

The Mares Avanti Quattro 4X Fins are the long-awaited evolution of the legendary Avanti Quattro+. Designed for divers of all levels, this open-heel fin combines comfort, power, and precise control. Whether you prefer flutter, frog, or back kicks, the Avanti QUATTRO 4X delivers smooth, efficient propulsion with minimal effort. Its construction merges Mares’ proven technologies with innovative refinements to improve performance in every underwater scenario.

Key features:

  • Three-material construction for performance and comfort: The entire fin is made from three different materials. This combination allows for a flexible yet responsive blade that maximizes thrust while reducing fatigue. The blend of materials is carefully chosen to balance power, durability, and diving comfort.
  • Optimized foot pocket design: The upper section of the foot pocket is made from soft thermoplastic rubber for a snug and comfortable fit. The lower section is reinforced and extends into the blade, improving stability and ensuring that leg energy is transferred efficiently into forward motion.
  • 4-channel blade for greater propulsion: Four channels along the blade bend and guide water efficiently, increasing thrust and reducing leg fatigue, even on longer dives.
  • Stabilizing side ribs with overmolding: The side ribs improve blade flex and reduce lateral movement. Overmolding reinforces the ribs and increases the channeling effect while adding a sleek visual finish.
  • Anatomical heel pad: Reduces stress on tendons and increases comfort. The large loop allows for quick donning and doffing, even with gloves.
  • Elastic bungee strap with protective cover: Easy to use, adaptable to different foot shapes, and protected to increase durability.
  • Anti-slip sole: A rubberized grip under the foot pocket ensures a firm hold on wet surfaces, making the fin safer to wear on boats or rocky shores.
  • Reusable mesh bag: Supplied with a quick-drying carry bag that supports Mares’ commitment to reducing single-use plastic.
Additional information
ColorAqua, Black, Black/Dark Grey, Black/Yellow, Blue, Orange, Orange/Dark Grey, White/Aqua/Light Grey, Yellow
SizeR, S, XL, XS
Brand
Fin StyleAdjustable, Bungee
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Shipping and Returns

Shipping and Return Policy

Shipping Charges for Online Orders

We offer Free Shipping on orders over $200.

Some items are not eligible for free shipping: Used Gear, Sharkskin, Oversize and overweight items (ex. paddleboards, large gear bags, tanks and weights).

For orders not eligible for Free Shipping, please use the "Calculate Shipping" option at checkout after entering your address.

If your order is eligible for Free Shipping and you'd like to have it shipped priority, please add into your order notes and our staff will reach out regarding any additional costs before shipping out your order.

How Will My Order be shipped?

We utilize a variety of courier options including Purolator, Canpar, UPS, ICS and Canada Post. We compare the different companies and choose the most economical option with the quickest time frame. If you have a preference for shipping options, please add it to the comments section at checkout.

Canada Post Strike: Due to the Canada Post strike, we will be using other alternatives when at all possible. If you live in a rural area or have a PO box address, please provide an alternate address is possible. Due to the higher shipping costs of shipping to the Maritimes and Territories there may be additional fees (we will reach out to you if this is the case).

Backordered Items

Does your item appear as backordered? Often this just means we do not have the item in stock at the moment but our supplier does. We place orders weekly from our major brands so often we will see your item within 1-3 weeks. If you need something in a hurry, please contact us before placing your order so we can give you an accurate eta. 

After placing your order, one of our staff will reach out and let you know when you can expect to receive your order.

How Long Will Delivery Take?

Orders are shipped within 1-2 days of placing your order. If an item is backordered or out of stock, one of our staff will be in touch.

Please note that the estimates below are "Business Days" (Monday-Friday). Please allow 1-2 days for processing/packing your order, especially during the holiday season! Orders placed after 2pm, will ship out the following day. If your order is placed after 2pm on Friday, it will not ship out until Monday.

Delivery time ranges from 2-10 days depending on location. If you need your order by a certain date, please be sure to add it in the order notes at checkout or contact us directly. We do everything in our power to ensure orders are delivered on time, but due to some circumstances out of our control with shipping companies, we cannot make any guarantees.

Where Can I View My Sales Receipt and Tracking Information?

Your invoice will be automatically sent to your email, please be sure to check your junk mail if you can't find it. If you created an account at checkout, you can click here to view your order history and receipts there as well.

Once your order has shipped, you will receive an email with tracking information.

What if I am Not Home when My Package is Delivered?

Due to the higher value of our products, all of our orders are shipped requiring a signature. This ensures that your order will not be left at your doorstep unattended if you are not home. If you need your order shipped without a signature, please put your request in the order notes. Please note that we cannot be responsible for lost or stolen packages if you choose not to have a signature.

Holiday Return Policy

Want to exchange or return an item? Orders placed between December 3rd – December 24th will have until January 7th to complete a return (or 14 days, whichever is longer). We will not be processing returns December 26th – 31st.

To be eligible for a return, all items must be unused and in new condition. Items must also be in their original, unaltered packaging, and include all packing materials, warranty cards, manuals and accessories. We can only refund or exchange products that have not been in contact with water or lubricant.

Returns that fail to meet the above requirements may be refused, or charged a restocking fee at the Diving Locker’s discretion.

Refunds: Refunds will be made with the original payment method. If your original order included Free Shipping and your return causes your order to fall below the Free Shipping minimum, a shipping charge will be deducted from your refund.

Exchanges: If you are exchanging an item and your original order included free shipping, we will cover the shipping of the new item to you (one time only).

Return Policy

Want to exchange or return an item? Online orders have a 30 days return policy (starting from the day your order is delivered). Items purchased in-store have a 7 day return policy.

To be eligible for a return, all items must be unused and in new condition. Items must also be in their original, unaltered packaging, and include all packing materials, warranty cards, manuals and accessories. We can only refund or exchange products that have not been in contact with water or lubricant.

Returns that fail to meet the above requirements may be refused, or charged a restocking fee at the Diving Locker's discretion.

**Freediving Wetsuits - Due to the sensitive nature of open cell neoprene, returned Freediving Wetsuits will be inspected thoroughly for any fingernail tears or holes, a restocking fee may apply for small damages, larger damages may result in a refusal of return.

Refunds: Refunds will be made with the original payment method. If your original order included Free Shipping and your return causes your order to fall below the Free Shipping minimum, a shipping charge will be deducted from your refund.

Exchanges: If you are exchanging an item and your original order included free shipping, we will cover the shipping of the new item to you (one time only).

What Items are Not Eligible for Returns?
  • Dive Trips & Dive Courses (Please view our cancellation policy here)
  • Gift Cards
  • Closeout/Sale Items
  • Special/Custom Orders (including drysuits)
  • **Prescription Masks can be returned but will be subject to a 10% restocking fee

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30 Day Return Policy