Earth River SUP DUAL S3 | S3R | X3 | GT GEN-3

The ERS DUAL S3 series utilizes the rugged and ultra-rigid Thermal Dual Core Construction, resulting in a board that carries more momentum across the water and is built to excel in all water environments and conditions. The Lake-River-Coast removable fin system lets you adapt the board for varied environments and challenges and the full gecko grip deck pad sticks even in the roughest whitewater or surf. Designed as a premium SUP series for paddling enthusiasts who demand the absolute best in performance, reliability, and features. The ERS Dual S3 GEN-3 series is the pinnacle of advanced inflatable SUP design and technology.


ERS DUAL 9-6 S3 | Neptune

The compactness and agility of the ERS 9-6 shape but with an added layer of ruggedness. The LRC fin configuration transforms it into a adaptable surf and low whitewater option - or run the single 8" or 9" center for sleek distance performance.
ERS Dual AQUA 9-6

ERS DUAL 9-6 S3 | Aqua

The ERS 9-6 S3 all-around shape in Aqua color with dark blue rail binding of the DUAL series boards.

ERS DUAL 9-6 S3R | Neptune

The Ultimate all-around River SUP in the ERS Neptune color. The most resilient and rigid X11 construction and flexible LRC fin set up designed to perform in all aspects of river paddling.

ERS DUAL 10-0 X3 | Neptune

A high-riding bullet shape that responds to your every move with incredible turning capabilities. Surfing, whitewater, or flat water – this board runs it all and adapts to paddler input exceptionally well.

ERS DUAL 10-0 X3 | Aqua

The ERS 10-0 X3 crossover shape in Aqua color with dark blue rail binding of the DUAL series boards

ERS DUAL 10-0 X3 | Eco Green

The ERS 10-0 X3 crossover shape with a new bright green color scheme with the dark blue rail binding of the DUAL series boards.

ERS DUAL 10-0 X3 | Code Red

The Code Red was initially designed for instructors to make they board as visible as possible amount any fleet. It returns to the GEN-3 series in limited edition. 

ERS DUAL 10-7 S3 | Classic Retro

The ERS DUAL 10-7 S3 | Retro is a throwback to our original SUP school designs that we made in orange and yellow. We combined them into this board which was so popular in 2018 as a limited edition it has returned in the GEN-3 series. Feel the glow.

ERS DUAL 10-7 S3 | Neptune

The ultimate multi-purpose shape, including the removable LRC fin system. Great at anything from waves to flat water, it is the perfect fit and balance for riders wanting an all-around SUP that does everything well.


ERS DUAL 10-7 S3 | Aqua

Tough color with the Aqua DUAL 10-7 S3. The unbeatable X9 construction and sky blue highlights give you the ultimate in performance and style on the water.

ERS DUAL 12-6 GT | Neptune

Meticulously shaped to strike the ideal balance of speed and stability. Versatile enough to run whitewater, paddle long distances or slice through the wave break to explore deep-water coastline.

ERS DUAL 12-6 GT | Eco Green

Limited run color variant of the ERS 12-6 GT features bright green colors and the signature dark rail binding of the DUAL series.

Construction and Features

The Earth River SUP DUAL GEN 3 series represents a no-compromise approach to building a board for optimal performance in demanding conditions. Board features are designed toward the needs of more advanced paddlers in challenging environments while maintaining the characteristics of an all-around board that everyone will enjoy for leisure paddling. DUAL boards are constructed with additional material layering to achieve a level of ruggedness and stiffness that enhances activities such as surfing, river running, and expedition touring while keeping the overall board weight at a level that makes the board easy to carry while still having enough heft to maintain momentum in moving water situations.

ERS Dual S3 and S3R

Core Material

ERS DUAL boards start with an internal core of PVC-coated high thread count drop stitch material that is bonded to an additional sheet of PVC-coated fabric. The resulting overall layup consists of two distinct layers of coated fabric which are bonded with adhesive at high pressure and temperature to function as a single multi-layer outer shell.  The edges of an ERS DUAL board are joined with two rail bands made of PVC coated fabric, with a stiffening strip made of a high tensile strength weave between the layers to enhance weight resistance.  Shape and rocker composition is tuned to each board design spec and edge integrity is increased by tightly folding over the edges of the drop stitch top and bottom fabric to form a locked fold. 

EDR on a DUAL 10-7

Enhanced Dynamic Rail (EDR)

The next generation in advanced rail technology. The Enhanced Dynamic Rail (EDR) is built right into Earth River SUP DUAL board* There are no unwieldily rail rods to fit and carry each session, no extra weight from ineffective layering. The EDR is designed to enhance the ERS experience in active or moving water environments such as surf, rapids, or rougher water to give you a better paddling experience.  Riders will apply force at a multiplier of their body weight when leveraging turns or making adjustments in rough water and the Enhanced Dynamic Rail provides resistance when you need it - without affecting the glide of the board on flat water or carrying weight when you are off it.

*The S3R RIVER uses our X11 core technology which does not use the EDR.


Shape & Thickness

ERS DUAL boards are shaped to combine specific performance needs with all-around versatility. Each board is designed to bridge multiple uses, ranging from whitewater to surfing to flatwater, yoga, and fishing.  Thickness is carefully calibrated to the overall board shape and purpose, with the X3 | GT | S3R boards utilizing 6” thickness to benefit from added volume and leverage but employing 5” thickness on the S3 outlines to enhance stability and balance.


Deck Pad & Handle

The ERS DUAL deck pad has a diamond groove 'GECKO' pattern which provides optimal grip while channeling water off the top of the board. It uses the highest density EVA foam, which improves comfort and cushioning while making the pad more durable than typical deck pads. The tail section has a raised foot bar which provides tactile feedback of foot positions and a raised back to keep the foot from sliding back when doing maneuvers that involve applying pressure to the tail of the board.   The handle is designed to conveniently lay flat when not in use and has a removable neoprene grip wrap for carrying comfort. Removing the grip provides a flat surface in the center of the board for lying down for yoga or stretching and keeps the surface free of obstacles for surfing.

10-0 DUAL on a beach

Fin System

Earth River SUP DUAL boards are equipped with the ultimate ERS Lake-River-Coast fin system that consists of fin boxes that accept a variety of removable fins made to US and FCS surfboard fin connection standards.This setup allows the user to configure the board for different uses and environments. A long center fin may be used for deep ocean or lake paddling when no obstacles are expected or can be swapped out for a shorter fin for shallow water or rocky venues. The board can also be used with or without side fins, depending on the desired performance characteristics for the particular use. In all, the ERS DUAL S3 | GT | X3 boards come with 8 fins - center fins in 4 sizes and 2 pairs of side fins - allowing you to tune your board’s performance for specific conditions and uses and find the fin setups that feel best to you. The S3R comes with a river specific fin configuration designed to tune lateral traction at lower water depths.

10-0 DUAL with girl holding paddle above her head


ERS DUAL boards include a host of hardware component upgrades, including stainless steel D-ring for leash and cargo bungee attachment and a genuine Halkey-Roberts inflation valve with custom ERS valve patch for reliable inflation and air seal. The DUAL series feature a stainless steel front tow ring and reliable single leash attach.  Earth River SUP has a simple approach to component selection - We always use the best available component for every purpose, regardless of its impact on manufacturing cost. 

ERS Running Rapids

ERS Compact Pump

ERS SKYLAKE boards come with an ERS Compact dual-action manual pump, which is designed and tested to provide the most efficient inflation performance in the most compact form factor. The internal valve configuration allows the single cylinder to deliver air on both the downstroke and upstroke, resulting in almost doubling the speed of inflation. The dual action is selectable and can be disabled when the board reaches pressures that make it easier to finish inflation in single-action mode. The extra weight and bulk of a two-barrel solution does not significantly speed inflation when compared with the more elegant and compact single barrel dual action pump provided with ERS boards.

ERS Dual Action SUP Pump


All Earth River SUP boards come with the ERS Rolling Backpack, which is made of ultra-durable 1600 denier canvas and is sized to fit the board, pump, paddle, and accessories while leaving room for personal belongings. The bag is equipped with a convertible backpack strap system, strap covering for airline travel, two internal straps, 4 external cinch straps, three inside mesh pockets, generously padded handles, a paddle pocket, and smooth-rolling wheels. The GEN-3 series features color coded front panels for easy identification and an elegant design to fit in with other luggage.


Right For You?

ERS DUAL GEN-3 boards combine rugged multi-layer construction, versatile design, upgraded materials and components, a highly configurable fin system, and the best available pump and travel bag to provide elite level performance boards for specific uses combined with all-around recreational paddling. Designed for the serious paddling enthusiast and professional SUP paddlers the DUAL is the most enhanced combination of features and performance available in an inflatable SUP on the market. 

ERS DUAL Insights and Reviews

Experiences, insights and feedback from people who ride the ERS DUAL series of boards and the reasons they choose to ride ERS.
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7810 Wisconsin Ave, Bethesda, Maryland 20814