SOUL4
Product number: FKSL4
Use Case
Technology
Skill
Freeride, Freestyle, Foil
Closed-Cell Foil Kite, 4-Level Ram-Air
Entry - Expert
Use Case
Freeride, Freestyle, Foil
Technology
Closed-Cell Foil Kite, 4-Level Ram-Air
Skill
Entry - Expert
Want to know more about our foil kite technology?
Discover how our foil kites are designed, tested, and refined. Learn more about the standards, materials, and technical details that shape the performance, safety, and durability of every FLYSURFER product.
Description
The SOUL⁴ is the fourth generation of our most successful closed-cell all-round kite, setting new benchmarks in versatility, usability, and performance. Designed as a true multi-discipline solution, it equally covers freeride, hydrofoil, and freestyle across water, snow, and land. As a fully matured product, the SOUL⁴ combines all key requirements of modern riders: intuitive handling, high comfort, efficient performance, compact packing size, reliable relaunch, and a precise, controlled flight feel. This clearly positions it as the ultimate one-kite solution for travel and diverse applications. The SOUL⁴ stands out with its highly intuitive and easy-to-repeat take-off behavior. Timing your take-off becomes precise and efficient, allowing optimal conversion of edge pressure into vertical lift. Every jump delivers strong lift potential combined with a controlled flight phase and extended hangtime.
The SOUL⁴ was developed to further expand the versatility of the platform while noticeably improving handling, efficiency, and control. The focus was on making the kite even more accessible while maintaining high performance across all disciplines.
Package
SOUL⁴ Kite only
UNIVERSAL Kite Bag 2026
LIGHT Bag
Sandbag
Repair Kit
Kite Safety Guide
Downloads
SOUL⁴ Line Plan 7
SOUL⁴ Line Plan 10
SOUL⁴ Line Plan 12
SOUL⁴ Line Plan 15
SOUL⁴ Line Plan 18
Technical Data
| SOUL⁴ | 7 | 10 | 12 | 15 | 18 |
|---|---|---|---|---|---|
| Aspect Ratio | 4.7 | 4.8 | 4.8 | 5.7 | 5.7 |
| Area projected (m²) | 5.52 | 7.88 | 9.46 | 11.83 | 14.19 |
| Flat Area (m²) | 7 | 10 | 12 | 15 | 18 |
| Wingspan flat (cm) | 573 | 692 | 758 | 924 | 1012 |
| Cells | 39 | 39 | 39 | 43 | 43 |
| Weight = canopy + complete bridle + mixer (kg) | 1.52 | 1.98 | 2.30 | 2.78 | 3.26 |
Wind Range
The wind range chart is to be used as a point of reference. It is based on a rider who weighs around 75kg (165lbs). Actual use will vary depending on your weight, skill level, board size/type (twintip or hydrofoil) and wind conditions on water or land. When choosing a kite size, always use common sense and repeatedly choose a smaller size if you are not sure, especially when using the kite on land.
Recommended Bar Sizes
Good to know
How does the SOUL⁴ compare to...
SONIC⁵
+ accessible power delivery
+ easier launch & relaunch
+ sits deeper in the window
+ worry-free handling
SUPERSONIC
+ bullet proof construction
+ easier launch & relaunch
+ tighter turning
+ sits deeper in the window
SOUL³
+ accessible upwind performance
+ lighter bar forces
+ better jumping performance
+ tighter turning
A SOUL is all you need.
With the SOUL⁴, every session feels more controlled, more efficient, and more rewarding. The kite builds power smoothly, rides with strong upwind drive, and reduces lateral forces for a noticeably more effortless experience.
Its biggest advantage shows in the air. By sitting slightly deeper in the wind window, the SOUL⁴ gives you consistent control, easier take-offs, and a more predictable landing phase. Landings are significantly more forgiving than on its predecessor and the SONIC series, allowing you to jump more often, with better timing and greater confidence.
Intuitive handling, reduced backstall, precise turning, and finely adjustable depower create a stable and comfortable flight feel in changing conditions. Combined with easy launch and relaunch, fast inflation, effective drainage, and durable construction, the SOUL⁴ is a reliable all-rounder for a wide range of riders, disciplines, and spots.
Features
Optimized Aerodynamics and profile balance
A refined profile and improved internal load distribution allow the SOUL⁴ to use aerodynamic forces more efficiently. This improves upwind performance, creates smooth and stable power delivery, and keeps the kite controlled across the entire wind window.
Fine-tuned bridle and steering response
The bridle setup is precisely matched to the updated profile. Optimized load distribution reduces steering forces while improving feedback from the kite. This creates lighter, more intuitive handling with high shape stability.
Efficient inflation and stable flight behavior
Refined airflow and a stable internal structure help the SOUL⁴ inflate faster and more evenly. The kite reaches a stable flight state early after launch, giving you better control and more confidence, especially in light-wind conditions.
Build confidence for your next session.
