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Sx-1 Plasma Knee Protector Black Red Cool Gray

Sx-1 Plasma Knee Protector Black Red Cool Gray

Q: Can they be worn under a fitted motocross pant?

Yes, their ergonomic and slim design allows comfortable wear under MX or enduro pants.

Q: Are they suitable for trail use?

Absolutely, their lightness and comfort make them ideal for off-road, trail, or supermoto.

Q: Are they sold in pairs?

Yes, the SX-1 Plasma are delivered in pairs (left knee + right knee).

£100.14

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Size

Size guide

Alpha XXS to XXL

Thigh calf / Thigh calf

Taille	Haut de la jambe	Mollet	≈ Pouces
XXS	33-36 cm	26-29 cm	12.99" - 14.17"
XS	36-39 cm	29-32 cm	14.17" - 15.35"
S	39-42 cm	32-35 cm	15.35" - 16.54"
M	42-45 cm	35-38 cm	16.54" - 17.72"
L	45-48 cm	38-41 cm	17.72" - 18.90"
XL	48-50 cm	41-43 cm	18.90" - 19.69"
XXL	50-52 cm	43-45 cm	19.69" - 20.47"

S - M

L - XL

XXL

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DESCRIPTION

Alpinestars SX-1 Plasma Knee Protector Black Red Cool Gray – Technical Articulated Knee Protector for Maximum Protection and Comfort

Premium Protection, Total Freedom of Movement: The SX-1 Plasma, the Perfect Blend of Innovation and Comfort.

Developed for demanding motocross, enduro, and off-road riders, the SX-1 Plasma Knee Protector Black Red Cool Gray offers an ideal combination of advanced protection, lasting comfort, and natural mobility.
Designed with a ventilated semi-rigid frame and featuring the Nucleon Plasma protector, this knee protector effectively absorbs impacts while perfectly following the knee's movements.

Its technological core, the Dual Gear System (DGS), replicates the natural kinematics of the knee joint through a smooth dual pivot system. Result: total freedom of movement, without restriction, even during the most dynamic phases.
The dual-density co-injected frame, lightweight and durable, avoids pressure points often caused by boots while ensuring a firm and precise fit.
The rigid patella cup provides complete protection against frontal and lateral impacts, while the double velcro straps ensure a quick and secure fit.

In short, the SX-1 Plasma offers a perfect balance between flexibility, safety, and comfort, allowing you to ride longer, more freely, and with complete confidence.

Technical Features:

Materials: High-performance polymer + viscoelastic Nucleon Plasma protector
Ventilation: Highly ventilated semi-rigid chassis
Articulated System: Integrated Dual Gear System (DGS) with double pivot
Closure: Double velcro straps + ratchet buckles
Design: Ergonomic, slim, and adaptable to different body types
Protection: Rigid cup + biobased energy absorber
CE Certification: EN 1621-1:2012 Level 1

Ride protected without compromising your mobility. Order now the SX-1 Plasma Knee Protector and discover intelligent protection by Alpinestars.

Ventilation

10/10
Comfort

6/10
Protection

6/10

x

Nucleon Plasma Protection: Bio-based viscoelastic material for effective impact absorption
Hinged DGS System: Double pivot replicating the natural movement of the knee
Dual-density frame: Firm support and superior comfort without pressure points
Complete patella protection: Rigid shell covering the entire knee
Customizable fit: Double Velcro strap with quick-release buckles for a secure fit

Superior protection: Effective energy dissipation in the event of an impact
Natural mobility: Fluid DGS system, unconstrained articulated movement
Long-lasting comfort: Breathable materials and a flexible frame over sensitive areas
Perfect stability: Stays well positioned under the pants, even in action
Racing design: Black / Red / Cool Gray colorway, modern and aggressive

Wear the SX-1 Plasma under your pants or jumpsuit for optimal fit.

After each use, wipe them down with a damp cloth and let them air dry at room temperature.

Avoid solvents and abrasive cleaners to preserve the materials and the flexibility of the hinges.

TECHNICAL SPECIFICATIONS