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Echo-Stalker Original Fabric Tail
There are parts of the ocean where light simply stops.
In those depths, creatures have learned something long ago, eyes are not always the best way to hunt.
The Echo-Stalker design draws inspiration from hunters of the deep that navigate the ocean through echo and vibration. The glowing rings along the tail represent pulses moving through the water like sonar, traveling outward and returning with a map of everything nearby.
Prey may never see them.
But the siren already knows where they are.
Echo-Stalker
The second design in the Darkwater Release.
Something in the deep is listening
Presale
This tail is part of a limited pre-order release.
Estimated production time is 12–16 weeks before shipment.
Each piece is produced in small runs to maintain consistency, detail, and quality from start to finish.
Tail Construction & Materials
Our swimmable fabric tails are constructed from 1 mm four-way stretch scuba knit fabric, featuring high-definition sublimation printed designs for vibrant color and realistic scale detail. Each Darkwater Fins tail features our original fluke design and includes a durable internal vinyl monofin casing. Monofins slide easily into the casing and are secured with internal velcro closures, allowing the fluke to move naturally and realistically through the water. All Darkwater Fins fabric tails are made to your custom measurements, ensuring a tailored and secure fit.
These tails are designed to accommodate a variety of monofins within the dimensions listed below. We recommend monofins with short, stiff blades such as the FINIS Shooter Monofin or FINIS Foil Monofin for best performance.
MONONFIN IS NOT INCLUDED
Tail Features
1 mm four-way stretch scuba knit tail skin
Custom fit based on your measurements
Elastic waistband for secure comfort
Invisible 30-inch color-matched side zipper
High definition sublimation printed design
Durable internal vinyl monofin casing with velcro closures
Original Darkwater Fins fluke design
Fluke Dimensions (Approximate)
Total Length: 36.5 inches
Width at Widest Point: 23.75 inches
This product is designed to be used with a monofin by proficient swimmers only. The quality and stiffness of your monofin will significantly affect swimming performance.
Always follow safe swimming practices:
Never swim alone
Avoid water deeper or more hazardous than your skill level
Swim in lifeguarded areas
Improper use of this product may result in injury or death.
International Orders
If you’re ordering from outside the U.S., your country may apply customs duties or import fees once the package arrives. These charges are not included at checkout.
Because of the size of these pieces, UPS is generally the most reliable options for international delivery.
Warranty & Support
Every Darkwater tail is carefully handmade and inspected before shipment. If you experience a manufacturing defect or issue related to craftsmanship, please contact us and we will gladly work with you to find a solution.
Customer satisfaction and the quality of our tails are extremely important to us.
Final Note
These tails are produced as part of a set release and are not offered with custom alterations.
Each one is handmade, and slight variation is part of the process.
There are parts of the ocean where light simply stops.
In those depths, creatures have learned something long ago, eyes are not always the best way to hunt.
The Echo-Stalker design draws inspiration from hunters of the deep that navigate the ocean through echo and vibration. The glowing rings along the tail represent pulses moving through the water like sonar, traveling outward and returning with a map of everything nearby.
Prey may never see them.
But the siren already knows where they are.
Echo-Stalker
The second design in the Darkwater Release.
Something in the deep is listening
Presale
This tail is part of a limited pre-order release.
Estimated production time is 12–16 weeks before shipment.
Each piece is produced in small runs to maintain consistency, detail, and quality from start to finish.
Tail Construction & Materials
Our swimmable fabric tails are constructed from 1 mm four-way stretch scuba knit fabric, featuring high-definition sublimation printed designs for vibrant color and realistic scale detail. Each Darkwater Fins tail features our original fluke design and includes a durable internal vinyl monofin casing. Monofins slide easily into the casing and are secured with internal velcro closures, allowing the fluke to move naturally and realistically through the water. All Darkwater Fins fabric tails are made to your custom measurements, ensuring a tailored and secure fit.
These tails are designed to accommodate a variety of monofins within the dimensions listed below. We recommend monofins with short, stiff blades such as the FINIS Shooter Monofin or FINIS Foil Monofin for best performance.
MONONFIN IS NOT INCLUDED
Tail Features
1 mm four-way stretch scuba knit tail skin
Custom fit based on your measurements
Elastic waistband for secure comfort
Invisible 30-inch color-matched side zipper
High definition sublimation printed design
Durable internal vinyl monofin casing with velcro closures
Original Darkwater Fins fluke design
Fluke Dimensions (Approximate)
Total Length: 36.5 inches
Width at Widest Point: 23.75 inches
This product is designed to be used with a monofin by proficient swimmers only. The quality and stiffness of your monofin will significantly affect swimming performance.
Always follow safe swimming practices:
Never swim alone
Avoid water deeper or more hazardous than your skill level
Swim in lifeguarded areas
Improper use of this product may result in injury or death.
International Orders
If you’re ordering from outside the U.S., your country may apply customs duties or import fees once the package arrives. These charges are not included at checkout.
Because of the size of these pieces, UPS is generally the most reliable options for international delivery.
Warranty & Support
Every Darkwater tail is carefully handmade and inspected before shipment. If you experience a manufacturing defect or issue related to craftsmanship, please contact us and we will gladly work with you to find a solution.
Customer satisfaction and the quality of our tails are extremely important to us.
Final Note
These tails are produced as part of a set release and are not offered with custom alterations.
Each one is handmade, and slight variation is part of the process.

