Alpinestars KMX-3 v2 Kart Racing Suit

2025 FIA Expiry – Clearance Item – Final Sale

The Alpinestars KMX-3 v2 Kart Racing Suit was developed for drivers seeking an athletic fit, excellent mobility, and substantial airflow during demanding karting sessions. Its technical two-layer design combines a flexible polyamide outer shell with a soft polyester toweling liner, giving the driver a balance of abrasion resistance, comfort, and freedom of movement.

Large mesh panels through the underarms, sides, and seat area help release heat, while fully floating sleeves and anatomically shaped panels allow the suit to follow the driver’s body in the seated karting position. This clearance inventory carries a 2025 homologation expiry and is non-returnable.

Clearance and Homologation Notice

This KMX-3 v2 is clearance inventory carrying a 2025 CIK-FIA homologation expiry. It should not be assumed eligible for events that require current homologation or an FIA 8877-2022-approved karting suit.

Drivers should confirm the sewn-in approval label and the current equipment rules of their track, championship, or sanctioning organization before purchasing for competition.

All clearance products are final sale and cannot be returned or exchanged.

An Athletic Suit Built Around Driver Movement

The KMX-3 v2 is cut closer to the body than many traditional karting suits. Its athletic profile reduces loose fabric around the torso, shoulders, and legs while maintaining the range of motion required for steering and pedal operation.

Strategically placed stretch materials allow the suit to flex as the driver reaches forward, rotates the shoulders, and moves within the seat. This helps maintain a secure fit without making the suit feel rigid or restrictive.

Technical Two-Layer Protection

The suit uses a two-layer construction designed around the abrasion risks of kart racing. Its stretch polyamide outer shell provides durability and helps resist material bunching, while the inner lining improves comfort against the driver.

The construction was originally certified to CIK-FIA Level 2 homologation standard N 2013-1. This is a karting abrasion standard and does not make the suit flame resistant for automobile competition.

Stretch Polyamide Outer Shell

A flexible polyamide outer fabric gives the KMX-3 v2 a more responsive feel than a rigid conventional kart suit. The material moves with the driver while maintaining the strength and abrasion resistance required from a competition-oriented karting garment.

The stretch shell is particularly beneficial around the shoulders, elbows, hips, and knees, where a driver repeatedly bends and changes position.

Polyester Toweling Liner

The inner polyester toweling liner creates a soft contact surface and helps draw moisture away from the body. This improves comfort during warm race days, indoor events, and multiple sessions completed in close succession.

The liner also helps prevent the outer shell from feeling harsh against the driver’s base layer or clothing.

Extensive Mesh Ventilation

Wide technical mesh sections are positioned beneath the arms, along the sides, and around the seat area. These zones target the parts of the body where heat commonly builds while seated in a kart.

The expanded mesh layout makes the KMX-3 v2 a strong option for drivers who prioritize ventilation and frequently race in hot or humid conditions.

Fully Floating Arm Construction

Alpinestars uses floating sleeves connected with stretchable knitted material. This design allows the arms to move more independently from the torso of the suit, reducing pulling across the shoulders when the driver reaches for the steering wheel.

The floating construction supports a more natural driving posture and helps limit resistance through repeated steering inputs.

Pre-Shaped for the Karting Position

Anatomical paneling through the arms, legs, and torso is patterned around a seated driving position. The shape helps reduce excess fabric behind the knees, around the waist, and across the elbows.

This keeps the suit more stable in the kart and reduces distracting material bunching during longer sessions.

Extraction Shoulder Epaulettes

Reinforced Alpinestars shoulder epaulettes provide defined handling points that may assist track personnel when helping a driver from the kart following an incident.

They also give the suit a recognizable professional racing appearance.

Adjustable Collar and Waist

The ergonomic collar includes a soft lining and an adjustable closure that provides secure coverage around the neck without unnecessary pressure.

An adjustable waist belt allows the driver to tighten the suit through the midsection, helping control loose material and creating a more personalized fit.

YKK Double-Slider Front Zipper

A premium metal YKK zipper provides a durable front closure. Two zipper sliders allow greater flexibility when opening, closing, or adjusting the suit while standing in the paddock.

Personalized synthetic leather pullers make the zipper easier to operate while wearing gloves.

Driver-Focused Practical Details

Knitted wrist and ankle cuffs hold the sleeves and pant legs securely in place. Two thigh pockets provide storage for small personal items while the driver is away from the kart.

These practical details make the KMX-3 v2 suitable for race weekends, instruction, practice sessions, and team use.

Alpinestars KMX-3 v2 Kart Racing Suit Features

• Clearance kart racing suit with 2025 homologation expiry
• Legacy CIK-FIA Level 2 homologation standard N 2013-1
• Technical two-layer construction
• Stretch polyamide outer shell
• Athletic competition fit
• Polyester toweling moisture-wicking liner
• Wide mesh panels beneath the arms, along the sides, and around the seat
• Fully floating sleeve construction
• Stretchable knitted arm panels
• Anatomical arm, leg, and torso shaping
• Soft-lined ergonomic collar
• Adjustable collar closure
• Adjustable waist belt
• Premium metal YKK double-slider zipper
• Personalized synthetic leather zipper pullers
• Knitted wrist and ankle cuffs
• Two thigh pockets
• Alpinestars extraction shoulder epaulettes

Technical Specifications

• Brand: Alpinestars
• Model: KMX-3 v2
• Product Type: Kart racing suit
• Condition: New clearance inventory
• Legacy Homologation: CIK-FIA Level 2, N 2013-1
• Listed Expiry: 2025
• Construction: Two layer
• Outer Shell: Stretch polyamide
• Inner Liner: Polyester toweling
• Ventilation: Mesh underarm, side, and seat panels
• Sleeves: Fully floating with knitted stretch fabric
• Closure: Metal YKK double-slider zipper
• Waist: Adjustable integrated belt
• Cuffs: Knitted wrists and ankles
• Pockets: Two thigh pockets
• Fit: Athletic

Best Uses for the KMX-3 v2

Because this clearance suit carries a 2025 expiry, its best applications are generally those that do not mandate current homologation. These may include open practice, indoor karting, private track sessions, driver coaching, testing, recreational events, team uniforms, or certain club competitions that still permit older equipment.

Competition eligibility always depends on the organizer’s current rules.

How the KMX-3 v2 Compares with the KMX-9 v2

The KMX-3 v2 offers a more athletic fit, a stretch polyamide shell, larger ventilation areas, and floating sleeves. These features give it a more flexible and performance-oriented feel.

The KMX-9 v2 is generally positioned as an entry- to intermediate-level suit with a more traditional outer shell and knitted stretch panels. Drivers prioritizing mobility and extensive airflow may prefer the KMX-3 v2.

Competition Karting Clearance Policy

This product is sold as clearance merchandise because of its expired homologation period and limited remaining inventory.

All clearance sales are final. This suit cannot be returned or exchanged for any reason, including sizing, fit, color preference, or competition eligibility.

Please review the size chart carefully and confirm your racing organization’s equipment requirements before ordering.

Alpinestars KMX-3 v2 Kart Racing Suit Size Chart

Frequently Asked Questions

What does the 2025 FIA expiry mean?

The suit’s stated homologation period ended in 2025. It should not be assumed eligible for events requiring current approval after that date.

Is the KMX-3 v2 approved to FIA 8877-2022?

No. This model was originally homologated to the earlier CIK-FIA Level 2 N 2013-1 standard.

Can I still use this suit in a kart race?

Possibly, but eligibility depends on the rules of the specific series, track, or sanctioning organization. Verify the approval label and regulations before purchasing.

Can I use it for practice or indoor karting?

Yes, provided the facility does not require a currently homologated suit.

Is the KMX-3 v2 a one-layer or two-layer suit?

It uses a technical two-layer construction.

What makes the outer shell flexible?

The outer fabric is made from stretch polyamide, allowing the garment to move more naturally with the driver.

Is the suit breathable?

Yes. Large mesh areas beneath the arms, along the sides, and around the seat provide extensive ventilation.

What are floating sleeves?

Floating sleeves are attached using flexible stretch material so the arms can move with less pulling across the shoulders and torso.

Does the liner manage perspiration?

Yes. The polyester toweling liner has moisture-wicking properties designed to improve comfort.

Is the waist adjustable?

Yes. An integrated belt allows the driver to tighten and personalize the waist fit.

What type of zipper is used?

The suit uses a premium metal YKK front zipper with two sliders and synthetic leather pullers.

Does the suit have pockets?

Yes. Two thigh pockets provide storage while the driver is outside the kart.

Can this suit be returned if it does not fit?

No. This is a clearance product, and all clearance items are final sale and non-returnable. Carefully review the sizing chart before ordering.

Can it be exchanged for another size?

No. Clearance products cannot be returned or exchanged.

Can the KMX-3 v2 be used for automobile racing?

No. It is a karting suit and is not a substitute for a flame-resistant automobile racing suit certified to FIA 8856-2018, SFI 3.2A, or another required auto-racing standard.