Nike ACG Ultrafly Trail HF5668-001 Black Photon Dust Trail Racing Shoes

• Exact SKU HF5668-001: Identifies the Black / Photon Dust / Photon Dust Ultrafly Trail.
• ZoomX Foam: Nike's highly responsive cushioning delivers strong energy return.
• Full-Length Carbon-Fibre Plate: Supports efficient forward movement across demanding trails.
• Improved Plate Flexibility: Reduced stiffness helps improve control on technical terrain.
• Vibram® Megagrip: Designed for durable traction on wet and challenging surfaces.
• Water-Draining Mesh: Lightweight breathable upper is designed to handle wet conditions.
• 8.5 mm Drop: Balanced trail-racing geometry for varied terrain.
• Approx. 287 g: Performance-focused lightweight construction.

Highly Responsive Cushioning

Nike uses ZoomX foam to provide high energy return while maintaining the stability needed for trail running.

Trail-Focused Ride

The cushioning is engineered to remain responsive while supporting control across uneven and constantly changing surfaces.

Exposed Heel Foam

ZoomX is more exposed around the heel to further enhance responsiveness through landing and transition.

Long-Distance Efficiency

Lightweight cushioning and strong energy return help support sustained performance over longer trail distances.

Full-Length Construction

A carbon-fibre plate runs through the full length of the cushioning platform.

Reduced Stiffness

Nike reduced plate stiffness compared with the original Ultrafly configuration.

Technical Trail Control

Increased flexibility helps the shoe adapt more naturally to uneven surfaces and changing terrain.

Efficient Movement

The plate works together with ZoomX cushioning to support smooth and efficient forward transitions.

Enhanced Trail Grip

Nike equips the Ultrafly Trail with a Vibram® Megagrip outsole for dependable off-road traction.

Wet-Terrain Performance

Megagrip is engineered to maintain traction on wet and challenging trail surfaces.

Strategic Trail Lugs

Outsole lugs are positioned to support grip during climbs, descents and directional changes.

Weight-Conscious Construction

The outsole layout balances traction and durability with the lightweight requirements of a racing shoe.

Lightweight Mesh

The upper uses lightweight mesh to maintain airflow during longer trail-running sessions.

Durable Construction

Nike engineers the material to withstand the demands of regular off-road use.

Water Drainage

The upper allows water to drain after puddles, stream crossings and other wet trail sections.

Not a Waterproof Model

The design prioritizes breathability and rapid drainage rather than a waterproof membrane.

Black

Black forms the dark foundation of the upper and gives the shoe a technical, understated trail aesthetic.

Photon Dust

Photon Dust introduces a light grey-to-silver tone across the linear upper graphics and supporting details.

Black / Grey Search Color

Customers may naturally describe this pair as black grey, charcoal grey or black silver. For exact SEO, Nike's official Black / Photon Dust / Photon Dust color name should remain primary.

Search-Friendly Terms

Customers may also search for this model as Nike ACG Ultrafly Trail Black Photon Dust, Nike Ultrafly Trail black grey, Nike ZoomX trail running shoes, Nike carbon trail shoes, Nike Vibram trail shoes, or HF5668-001.

Trail Racing

Nike officially positions the Ultrafly Trail as a trail-racing shoe.

Technical Terrain

Carbon-plate flexibility and Vibram traction support control across uneven and technical surfaces.

Wet Trails

Water-draining mesh and Megagrip traction make the shoe suitable for changing and wet trail conditions.

Climbing

Strategically positioned outsole lugs help provide traction during uphill sections.

Descending

Trail-focused grip and flexible plate tuning help support control during descents.

Long-Distance Performance

ZoomX cushioning and carbon-assisted efficiency support sustained trail-racing efforts over longer distances.

The Ultrafly Trail uses Nike's performance trail-running fit, designed to keep the foot secure while moving across uneven terrain.

Black Technical Wear

Black cargos, trail pants and technical jackets create a clean monochrome look around the dark upper.

Grey

Light grey and charcoal clothing naturally complement the Photon Dust graphics.

Outdoor Styling

Lightweight shell jackets, trail shorts and utility pants match the model's performance-focused ACG character.

Lifestyle Use

Although designed primarily for trail racing, the technical Black / Photon Dust appearance also works with contemporary outdoor-inspired streetwear.

Remove Trail Debris

Allow mud to dry before gently brushing away loose dirt, stones and debris.

Clean Mesh Gently

Use a soft brush with mild footwear cleaner and cool water.

Clean Vibram Lugs

Remove compacted mud and stones from the outsole to help maintain effective trail traction.

Protect the ZoomX Foam

Avoid sharp objects and aggressive scrubbing around exposed foam sections.

Avoid Harsh Chemicals

Strong cleaners may affect mesh, foam, bonding and outsole materials.

Do Not Machine Wash

Machine washing may damage the carbon plate, ZoomX foam and bonded construction.

Air Dry Naturally

Dry in a shaded and ventilated area away from direct heat.

What is the exact model?

Nike officially names the model Nike ACG Ultrafly Trail.

What is the SKU?

The exact style code is HF5668-001.

What is the official colorway?

Nike lists Black / Photon Dust / Photon Dust.

Is this black and grey?

Visually yes. Black and grey are useful customer search terms, while the official Nike color name is Black / Photon Dust / Photon Dust.

Does it use ZoomX?

Yes. It uses a highly responsive ZoomX foam midsole.

Does it have a carbon plate?

Yes. It features a full-length carbon-fibre plate.

What outsole does it use?

It uses a Vibram® Megagrip outsole.

Is it waterproof?

Nike does not describe this shoe as waterproof. Its mesh upper instead prioritizes breathability and water drainage.

What is the heel-to-toe drop?

Nike lists an 8.5 mm drop.

How much does it weigh?

Nike lists approximately 287 g in men's UK 9.

Available through HYPEKIXK. Select your preferred size before checkout and review all product information before ordering.

Mesh texture, stitching, panel alignment and color placement may show minor variation between individual pairs or production batches.

Black and Photon Dust tones may appear slightly lighter, darker or more silver depending on photography, lighting and screen settings.

The photographed box confirms NIKE ACG ULTRAFLY TRAIL, HF5668-001, Men US 8, UK 7, EU 41, CM 26 and Made in Vietnam.

Technical specifications on this page reference Nike's published information for ACG Ultrafly Trail HF5668-001.

Product names, trademarks, technology names and style codes are used for identification and informational purposes.

HYPEKIXK is an independent retailer and is not affiliated with, endorsed by or an authorized retailer of Nike.

This is a non-retail / non-authentic product referencing the original design. QC photographs are provided before shipment so customers can review the exact pair before dispatch.