Product sheet created in August 2026
The Mystic Stealth Waist Harness 2025 is Mystic's benchmark hardshell waist harness, and the lightest the brand has ever produced, weighing in at just 1018 g for a size M. Its composite carbon Bionic Core Frame transmits power from your Kite without delay, while retaining enough torsional flex to move with your torso. This harness is built for committed kitesurf and long sessions, and you'll forget it's even there once you cinch it down.
KEY INFORMATION
What we like
- The lightest in the Mystic range: 1018 g in size M, thanks to 3D molded padding and a lowered shape.
- Bionic Core Frame: 9/10 stiffness for control in overpowered conditions, with 6/10 torsional flex for mobility.
- Flexagon Drytech: This non-absorbent foam grips your waist and stays light throughout your entire session.
- Lockable Flexcovers: Excess webbing is neatly stowed and secured, so nothing flaps around.
- Integrated knife pocket: A hidden compartment behind the flexcover keeps your safety knife within reach.
- Battle Belt halved in thickness: A thinner main tightening strap makes spreader bar closure easier.
Available sizes
XS, S, M, L, XL, XXL
Color
Black, Truffle, Sand, Black / Lime, Tidal Blue
Use
Kitesurf, all styles, from freeride to committed freestyle.
Included / Not included
- ✓ Mystic Stealth Waist Harness 2025
- ✓ Adaptive Leash Eye 2.0
- ✗ Stealth Bar Gen 3 or Ace Bar spreader bar (sold separately)
- ✗ Safety knife
DETAILED DESCRIPTION
Bionic Core Frame: Stiff where it matters, flexible where it counts.
The Stealth 2025 features a Bionic Core Frame backplate made from composite carbon. Mystic rates its stiffness at 9/10. This ensures the Kite's power transfers directly into the harness, preventing the shell from compressing when the Kite pulls hard. The frame maintains a 6/10 flex in torsion. This allows your torso to pivot freely when you look at your Kite or initiate a rotation, without the harness acting as a bridle on your movement. This design is ideal for strong wind and overpowered conditions, where a softer harness would deform and ride up.
1018 g: The lightest Stealth ever produced.
Mystic has redesigned the shape, lowering the side height and incorporating 3D molded padding. The result is a mere 1018 g for a size M. This makes it the lightest harness in the brand's catalog. Less material on the sides also means fewer pressure points on your ribs during long sessions. The Flexagon Drytech foam does not absorb water. This means your harness won't get heavier during your session, and it adheres to your waist like a second skin, which limits it riding up.
Battle Belt, Flexcovers, and knife pocket.
The Battle Belt is half the thickness of the previous generation. It remains the primary adjustment point for the harness and simplifies spreader bar closure, without adding bulk to your stomach. The Flexcovers, new for this year, neatly store excess webbing and lock it in place. No more flapping in the wind. Behind the lateral flexcover, a dedicated pocket securely holds a safety knife, accessible with one hand in case of trouble on the water.
Adaptive Leash Eye 2.0 and compatibility.
The Adaptive Leash Eye 2.0 positions the safety leash attachment point on the front strap of the harness, keeping it visible and within easy reach. The Stealth 2025 is compatible with the Mystic Stealth Bar Gen 3 or the Ace Bar, both sold separately. Size 28 is recommended for M, 28 or 32 for L, and 32 for XL. The Digital Product Passport QR code sewn onto the harness provides access to warranty registration and Mystic services.
TECHNICAL SPECIFICATIONS
SIZE GUIDE
| Size | EURO | Waist size (cm) | Waist size (inch) |
|---|---|---|---|
| XS | 40-42 | 67-77 | 26"-30-inch |
| S | 44-46 | 75-84 | 29"-33-inch |
| M | 48-50 | 82-91 | 33"-35-inch |
| L | 50-52 | 89-96 | 35"-38-inch |
| XL | 54-56 | 94-104 | 37"-41-inch |
| XXL | 56-58 | 102-114 | 41"-45-inch |
Data: official Mystic guide. If you are between two sizes, choose the smaller one. A hardshell harness must be tight to prevent it from riding up.
| Specifications | |
|---|---|
| Brand | Mystic |
| Model | Stealth Waist Harness |
| Year | 2025 |
| Type | Hardshell waist harness |
| Use | Kitesurf, all styles. |
| Frame | Bionic Core Frame, composite carbon. |
| Stiffness rating | 9/10 |
| Torsion flex | 6/10 |
| Padding | 3D molded, non-absorbent Flexagon Drytech. |
| Battle Belt | 50% thinner. |
| Flexcovers | With locking, integrated knife pocket |
| Adaptive Leash Eye | 2.0, front position |
| Spreader bar compatibility | Stealth Bar Gen 3, Ace Bar |
| Weight (size M) | 1018 g |
| Available sizes | XS, S, M, L, XL, XXL |
| Color | Black, Truffle, Sand, Black / Lime, Tidal Blue |
| Digital Product Passport | Mystic QR code |
FAQ
Who is the Mystic Stealth Waist Harness 2025 for?
For intermediate to expert kitesurfers seeking a lightweight hardshell harness with direct power transmission. Its 9/10 stiffness composite carbon shell is built for strong wind and overpowered conditions, perfect for both freeride and freestyle.
How do I choose the right size?
To find your perfect fit, measure your waist circumference at your navel and consult our guide: M for 82 to 91 cm, L for 89 to 96 cm, and XL for 94 to 104 cm. If you're between sizes, always choose the smaller one. A snug hardshell harness is essential to prevent it from riding up during your session.
Is the spreader bar included?
No, it does not. The harness comes with its Adaptive Leash Eye 2.0, but the spreader bar is sold separately. It's designed to be used with either the Stealth Bar Gen 3 or Mystic's Ace Bar, available in 28 or 32 cm, depending on your harness size.
What is the difference from the Stealth Evolve?
The Stealth Evolve shares the same geometry but uses recycled and bio-sourced materials, weighing in at 900 g for a size M. In contrast, the Stealth 2025 features classic composite carbon, weighs 1018 g, and is offered in five colors and six sizes, from XS to XXL.
How do I maintain the harness?
After every session, rinse your harness with fresh water and let it air dry in the shade. Store it flat. The Flexagon Drytech foam doesn't absorb water. This ensures quick drying. Remember to regularly inspect the velcro and the Battle Belt for wear.
Why buy from GlissEvolution?
Benefit from the expert advice of our specialized team and comprehensive after-sales support.
▶ Need some advice?
GlissEvolution - 2c avenue du Gulfstream, 44380 Pornichet (Loire-Atlantique)
09 62 64 74 77 | WhatsApp: 07 83 28 39 94 - Tuesday to Saturday, 10am-1pm / 3pm-7pm
Test center available by appointment
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