What Is FIA Approved Race Underwear? The Complete Guide to Nomex Motorsport Base Layers

When most drivers think about racewear, the focus naturally falls on the race suit, gloves, boots and helmet. But underneath the suit is another critical part of the driver's safety system: FIA approved race underwear.

Race underwear is the layer worn closest to the skin. It is designed to provide an additional level of protection against heat and flame while helping regulate temperature, manage moisture and maintain comfort inside the cockpit.

For drivers competing in FIA-regulated motorsport, choosing the right Nomex race underwear is not simply about comfort. The right base layer forms an important part of a complete, properly homologated racewear system.

Fyshe's Delfino Race Underwear has been developed around this principle: protection first, followed by comfort, fit and performance.

What Is Race Underwear?

Race underwear is a specialist fire-resistant base layer designed specifically for motorsport.

Unlike conventional underwear or technical sportswear, FIA-approved race underwear is manufactured and tested to meet defined motorsport safety requirements.

A complete racewear system can include:

• Nomex race underwear top

• Nomex race underwear pants

• FIA approved race socks

• FIA approved balaclava

These layers are worn underneath the race suit and are designed to work as part of the overall protective system.

The Fyshe Delfino range includes a Nomex underwear top, pants, socks and balaclava, allowing drivers to build a complete base-layer system from a single range.

Why Do Racing Drivers Wear Nomex Underwear?

The purpose of Nomex race underwear is fundamentally different from ordinary performance underwear.

In motorsport, the driver is operating inside a confined environment surrounded by fuel, electrical systems, hot engine components and extremely high temperatures. In the event of a fire, every layer between the driver and the heat source matters.

Nomex is an inherently flame-resistant fibre used extensively in motorsport protective clothing.

Unlike conventional synthetic fabrics, inherently flame-resistant fibres are designed to retain their protective properties rather than simply relying on a surface treatment.

This makes Nomex particularly suited to the demanding environment inside a racing car.

What Is FIA 8856-2018?

FIA 8856-2018 is an international standard governing protective clothing used in motorsport.

FIA-homologated racewear is subjected to specific testing requirements relating to areas including flame resistance, heat transfer and material performance.

For drivers competing in regulated motorsport, checking the homologation of every part of the racewear system is essential.

Fyshe's Delfino race underwear is produced to FIA 8856-2018 requirements and carries FIA labelling for competition use.

The important point is that race underwear should not be treated as ordinary clothing.

It is protective equipment.

What Makes Good FIA Race Underwear?

Not all race underwear is created with the same priorities.

A high-quality motorsport base layer needs to balance several characteristics simultaneously.

1. Fire Resistance

The primary purpose of FIA race underwear is protection.

The material and construction must provide the required level of resistance to flame and heat exposure as part of the driver's overall protective system.

2. Breathability

Racing environments can become extremely hot.

Inside a cockpit, temperatures can rise significantly during long sessions, endurance races and summer events.

A breathable base layer helps manage heat and moisture while maintaining a close fit against the body.

3. Lightweight Construction

The best race underwear should not feel bulky beneath the race suit.

Excess material can create pressure points, increase friction and become distracting during a race.

Delfino has been developed with a lightweight, ultra-thin construction designed to sit close to the body beneath the race suit.

4. Freedom of Movement

A racing driver is constantly moving.

Steering inputs, gear changes, pedal movements and changes in body position all require unrestricted movement.

A close-fitting base layer should move with the driver rather than bunching underneath the race suit.

5. Low-Profile Construction

Seams and excess fabric can become particularly noticeable during long stints.

Delfino uses a tailored construction designed to minimise bulk beneath the race suit and reduce unnecessary friction.

FIA Race Underwear vs Normal Sports Base Layers

This is an important distinction.

A high-performance running base layer might be designed to manage sweat and regulate body temperature.

It is not automatically suitable for motorsport.

Motorsport base layers have a different primary requirement: fire protection.

A garment can be lightweight, breathable and comfortable but still be inappropriate for regulated motorsport if it does not carry the required homologation.

For this reason, drivers should always check the certification and labelling of their race underwear rather than assuming that a conventional technical base layer is suitable.

What Should You Wear Under a Race Suit?

For FIA-regulated competition, a typical complete base-layer system can include:

Upper body: FIA approved Nomex race underwear top

Lower body: FIA approved Nomex race underwear pants

Feet: FIA approved Nomex race socks

Head and neck: FIA approved Nomex balaclava

The objective is continuous protection between the skin and the outer race suit.

The fit is equally important.

Race underwear should sit close to the body without restricting movement. Excess fabric can bunch beneath the suit, while an overly tight garment can create discomfort during long periods in the cockpit.

Delfino: Fyshe's Nomex Race Underwear System

The Fyshe Delfino range has been developed as a complete motorsport base-layer system rather than a collection of unrelated garments.

The range includes:

Delfino Nomex Race Underwear Top

A tailored, lightweight base layer designed to sit close to the body beneath the race suit.

Delfino Nomex Race Underwear Pants

A close-fitting lower-body layer designed to minimise bulk while providing the required protective coverage.

Delfino Nomex Race Socks

Designed to provide fire-resistant protection while maintaining comfort and pedal feel inside the racing boot.

Delfino Nomex Race Balaclava

A lightweight protective layer for the head and neck, designed to integrate beneath a helmet and race suit.

Each piece is made in Italy and designed around the same Fyshe philosophy: technical performance without unnecessary bulk or distraction.

Why Made in Italy Matters

For Fyshe, manufacturing is part of the product rather than an afterthought.

Delfino is made in Italy, combining motorsport-grade materials with the craftsmanship and construction standards associated with the Fyshe Atelier.

The result is race underwear that sits somewhere between technical equipment and luxury product.

It should perform to the required standard, but it should also feel considered.

How Should FIA Race Underwear Fit?

Race underwear should generally fit close to the body.

The objective is to create a consistent layer between the driver's skin and race suit without excessive fabric.

A good fit should:

• Sit close to the body

• Allow unrestricted movement

• Avoid bunching

• Minimise excess material

• Work seamlessly beneath the race suit

• Remain comfortable during long sessions

For drivers who spend hours inside a cockpit, these details become increasingly important.

How Do You Wash Nomex Race Underwear?

Correct care is essential.

Fyshe recommends washing race underwear using a gentle cycle and mild detergent. Bleach and fabric softeners should be avoided, as inappropriate cleaning products can affect the performance of flame-resistant materials.

Always follow the manufacturer's specific care instructions.

Race underwear should also be inspected regularly for wear, thinning, damage or degradation.

Protective equipment should be replaced if its integrity has been compromised.

Can Race Underwear Be Personalised?

Yes.

For teams and drivers looking for a more individualised racewear package, Fyshe also offers Printed Delfino Underwear.

Logos, sponsor branding, driver names, numbers and graphics can be integrated into the garment, allowing the base layer to become part of the team's overall visual identity.

This is particularly useful for professional motorsport teams where consistency across every layer of the driver's equipment matters.

The result is a base layer that provides the required protective function while also carrying the identity of the driver, team or sponsor.

Who Should Wear FIA Approved Race Underwear?

FIA approved race underwear is relevant to a wide range of drivers, including:

• Professional racing drivers

• GT drivers

• Historic racing drivers

• Endurance competitors

• Club-level racers

• Drivers competing in FIA-sanctioned championships

• Serious track and competition drivers

The level of competition may change, but the fundamental principles remain the same: protection, fit, comfort and reliability.

Racewear Should Work as a System

A racing driver's equipment is not a collection of individual products.

The helmet protects the head.

The HANS system supports the head and neck.

The race suit protects the body.

The gloves protect the hands.

The boots protect the feet.

And the base layer provides the first protective layer against the skin.

When these components work together correctly, the driver should barely notice them.

That is the objective.

No distraction. Just protection, comfort and concentration.

Discover the Fyshe Delfino Race Underwear Collection

The Fyshe Delfino Race Underwear collection brings together FIA 8856-2018 compliant Nomex base layers designed for modern motorsport.

Made in Italy and engineered around lightweight construction, breathability, fit and protection, Delfino is designed for drivers who expect more from the layer beneath their race suit.

Explore the complete range of Fyshe Nomex Race Underwear, including the Delfino top, pants, socks and balaclava.

Shop the Fyshe Delfino Race Underwear Collection

Frequently Asked Questions

What is FIA approved race underwear?

FIA approved race underwear is specialist fire-resistant base-layer clothing designed and tested for motorsport use under applicable FIA safety standards.

What is Nomex race underwear?

Nomex race underwear is a fire-resistant motorsport base layer made using inherently flame-resistant fibres. It is worn beneath a race suit to provide an additional level of protection while supporting comfort and temperature management.

Is FIA 8856-2018 race underwear necessary?

For drivers competing under regulations that require FIA 8856-2018 protective clothing, appropriately homologated racewear is required. Always check the regulations governing your specific championship or event.

Can I wear normal underwear under a race suit?

Normal underwear is not a substitute for homologated motorsport base layers. Drivers competing under FIA regulations should use the protective equipment specified by the applicable regulations.

What should I wear under a racing suit?

A complete system can include a fire-resistant Nomex top, pants, socks and balaclava, subject to the requirements of the relevant competition regulations.

Where is Fyshe Delfino race underwear made?

Fyshe Delfino race underwear is made in Italy and designed as part of Fyshe's premium motorsport apparel range.

Can Fyshe Delfino race underwear be customised?

Yes. Fyshe offers Printed Delfino Underwear for teams and drivers requiring integrated logos, sponsor branding, names, numbers or graphics.