In short. Choosing the size of a Parawing doesn't come down to its surface area alone in square meters. Real power depends on precise aerodynamic parameters: aspect ratio, profile thickness (camber), construction type (single or double skin) and drag generated by the bridle. At equal surface area, a compact or double-skin wing won't cover the same wind range as a high aspect ratio or single-skin wing. On the FYNIX, four full sizes (3, 4, 5 and 6 m) are enough to cover all conditions. Thanks to the PushBar System®, which offers dynamic depower-sheet control, the wind range of each wing is significantly widened, eliminating the need for half-sizes.
What does the power of a Parawing depend on? (Beyond surface area)
Before choosing a surface area, you need to understand that square meters aren't everything. Surface area is just one parameter among many. The real power generated by a wing depends directly on the architectural choices made by the designer:
- Profile thickness (camber): Put simply, the power generated is proportional to profile thickness. The thicker a wing's camber, the more power and torque it generates at low speed.
- Aspect ratio: A high aspect ratio wing (thin and slender) will glide better, generate higher top speed and take off sooner in light wind. In return, it will be less packable (more complex and bulky to fold on water or beach). Conversely, a more compact wing offers increased maneuverability and is much easier to fold.
- Bridle (The stability/drag compromise): The bridle is essential for profile maintenance. The more bridle lines, the better the wing holds in strong wind. However, each bridle line adds aerodynamic drag, which slows the wing. The entire art of design is finding the perfect compromise: excellent structure integrity with minimum lines to reduce drag.
- Your equipment (Foil and Board): A high-lift foil (big shape) and a board with volume make you take off sooner, allowing a smaller wing. A small fast foil will need more power to express itself. The subject is covered in detail in our guide which foil to choose for Parawing.
Single skin vs Double skin: the truth about drag and power
This is the fundamental point that explains why two 4 m² wings from different brands don't function at all in the same wind:
Double Skin (Priority to glide): Contrary to popular belief, a double-skin wing does not generate less intrinsic power, but it generates much less drag. It offers maximum glide and acceleration, approaching kitefoil sensations. However, its profile requires a minimum air flow speed to inflate and establish, which shifts its usage range upward (it requires more wind to start).
Single Skin (Priority to torque and lightness): A single-skin wing generates more drag, which gives it tremendous power and torque at low speed (bottom of range). This is ideal for pulling out of the water easily. However, this extra drag means it saturates faster at top speed and will end up pulling harder on your arms as the wind increases.
| Construction | Dynamic behavior | What you gain | The aerodynamic compromise |
|---|---|---|---|
| Single skin | More drag, big torque at low speed | Takes off very early, ultra-light and compact to store. | Saturates faster at top speed, pulls harder on arms in max conditions. |
| Hybrid | Balanced drag / glide compromise | Smooth glide, less hand effort, excellent upwind capability. | Slightly less compact when packing than pure single skin. |
| Double skin | Minimal drag, high air penetration | Maximum speed and glide (kitefoil sensations). | Requires more apparent wind to establish profile at takeoff. |
At equal construction, fabric also matters. The FYNIX uses a light 30 g/m² canvas, naturally water-repellent. This lightness improves flight in light conditions: the wing stays dry and responsive, holds better in the air when wind drops, making takeoff easier. Conversely, canvas that absorbs water becomes heavier, increases drag and loses considerably from the low end of the range.
Remember this for later: construction shifts the wind range. That's why the ranges announced below always apply to a specific construction, here single skin. Choosing your construction therefore already orients your size.
What size based on wind and your body weight?
The table below shows the wind ranges of the FYNIX in single skin. A critical point to note: these ranges are for the FYNIX, wider than the market average thanks to the PushBar System®. A standard wing without dynamic power management won't cover the same range.
| FYNIX Size | Wind range (single skin) | For what use |
|---|---|---|
| 6 m² | 8 to 20 knots | Light wind, ideal for heavy riders or low aspect ratio foils. |
| 5 m² | 10 to 25 knots | The versatile light to moderate wind, perfect for beginners. |
| 4 m² | 14 to 29 knots | The all-rounder once wind is properly established. |
| 3 m² | 23 to 35+ knots | Strong wind, for experienced riders. |
These ranges apply to a reference rider of about 80 kg and assume you adapt the foil and board size. Adjust based on your weight: lighter (60 to 70 kg), you can drop a size. Heavier (90 to 100 kg), go up a size to compensate for the takeoff power requirement. For the complete method, see our guide how to choose your Parawing.
Why the FYNIX range eliminates the need for half-sizes
By analyzing the market, you'll notice that most brands offer up to 6 or 8 different sizes (e.g. 2.2m, 3.5m, 4.7m, etc.). When the usage range of a fixed-profile wing is narrow, multiplying intermediate sizes is the only way to fill the gaps between two surfaces.
At SROKA, we took the opposite approach through technological innovation. Why buy and transport two wings when one can cover the same range?
The FYNIX is the first Parawing equipped with true dynamic depower-sheet control thanks to the PushBar System®. This system, registered trademark and patent pending, works with lines that slide inside the 32 cm carbon bar. Instead of suffering from wind variations or having to manually adjust the angle of attack at the bridle, it modifies wing geometry in real time. By dramatically extending the top end of each profile's range, the PushBar System® radically widens the versatility of each surface.
Result: 4 full sizes (3, 4, 5 and 6 m) are enough to cover a monumental range of 8 to over 35 knots. Your quiver is simpler to choose, lighter to transport, and much more economical to purchase. Discover the range in the SROKA Parawing collection.
| Brand and model | Number of sizes in catalog | Wind range management |
|---|---|---|
| FYNIX SROKA (single skin) | 4 full sizes (3, 4, 5, 6) | PushBar System® : Dynamic depower-sheet control that extends the wind range of each profile. |
| BRM S3 | 5 sizes | Fixed profile. Multiplication of surfaces to avoid wind range gaps. |
| Flysurfer POW 2 | 5 sizes | Fixed profile. Tight usage ranges per wing. |
| Ozone PowerPack | 6 sizes | Fixed profile. Requires purchase of intermediate sizes. |
| F-One Frigate | 8 sizes | Fixed profile. Very wide range of half-sizes needed to cover 8 to 30 knots. |
Data from official brand technical documentation, 2026 survey.
One wing only in your bag. Where a standard rider must carry two fixed wings to handle any wind variation, the FYNIX's wide range secures your sessions with a single wing. Less clutter, less budget, more peace of mind.
One wing or a complete quiver?
To get started in Parawing, no need to complicate your equipment. A 4 m or 5 m covers the vast majority of needs. A slightly larger wing provides more support at takeoff, stabilizing the precarious balance of first flights.
The ideal setup for beginners: a FYNIX single skin 5 m, a Downwind-oriented board (like the Sroka LW Mid around 7'2), and a high aspect ratio foil from the UHA range between 1,300 and 1,500 cm²: this aspect ratio maximizes both lift, to take off early, and glide once launched. You drop down in foil surface once you've mastered the basics.
FAQ: What size Parawing to choose
What size Parawing for beginners?
A 4 m or a 5 m. They provide more support and stability than a smaller size. In light summer wind, choose the 5 m by default.
What foil to choose for beginners in Parawing?
A front wing of 1,300 to 1,500 cm² with high aspect ratio, in the UHA range. This aspect ratio maximizes both lift, to take off early and at low speed, and glide once launched. All the details in our guide which foil to choose for Parawing.
Single or double skin for beginners in Parawing?
Single skin without hesitation. It generates more drag but offers phenomenal torque at low speed to pull out of the water easily, while remaining ultra-light and easy to fold (packable).
Why doesn't the FYNIX have half-sizes?
Thanks to the PushBar System®. This dynamic depower-sheet control system (registered trademark, patent pending) modifies wing geometry in real time, widening its usable wind range and making intermediate sizes unnecessary.
Does Parawing aspect ratio change size choice?
Yes. High aspect ratio glides better and takes off sooner but is bulky to fold. A compact profile is extremely maneuverable and easy to pack on water, but will need a bit more surface for the same very light wind.
About the author
Bruno Sroka is a triple world champion in Kitesurfing and Kitefoil, former PE teacher and founder of SROKA Company. His expertise as an extreme rider, adventurer and technical designer feeds the aerodynamic development of every foil, Wing Foil and Parawing product from the brand. He is the designer of the PushBar System®.
To deepen your technical knowledge: discover our exhaustive comparison between Parawing and Wing foil and our ultimate guide to the 30 essential questions about Parawing.
