Manufacturer:
The VJ-Sport IRock 4 is a lightweight performance trail running shoe designed for soft, muddy, and technical terrain. Updated with a soft anti-slip heel and refined upper fit, it delivers improved foot security and comfort during demanding runs and races. The aggressive 8 mm lug outsole combined with VJ’s Superior Contact rubber provides exceptional grip on slippery surfaces, while the durable Schoeller®-Keprotec® upper offers long-lasting protection. The integrated Fitlock system creates a precise, secure fit around the arch for confident movement on technical ground. Ideal for orienteering, skyrunning, obstacle course racing, and trail running in softer conditions.

The VJ-Sport IRock 4 is built for runners who need uncompromising grip and precision in soft, technical terrain. Now updated with a soft anti-slip heel, the latest IRock 4 delivers an improved fit that helps keep the foot secure even during demanding races and fast descents. Small refinements to the upper design further enhance comfort and hold, while the aggressive lug pattern continues to offer the exceptional traction the IRock range is known for. Designed specifically to perform in wet, muddy, and unpredictable conditions, the outsole sheds loose debris efficiently while VJ’s signature Superior Contact outsole and Butyl rubber compound provide outstanding grip across slippery surfaces. The durable Schoeller®-Keprotec® upper with aramid fibres offers excellent protection and abrasion resistance, while the integrated Fitlock system works with the lacing to secure the shoe around the arch for a more precise, locked-in feel. Lightweight and responsive on technical ground, the IRock 4 remains a favourite for orienteering, obstacle course racing, skyrunning, and trail running in softer conditions.

Features:
Updated soft anti-slip heel for improved fit and foot security
Aggressive outsole designed for soft and slippery terrain
8 mm lug depth for maximum traction in demanding conditions
Lug configuration helps shed mud and loose debris
Superior Contact outsole with VJ Butyl rubber for exceptional grip
Durable Schoeller®-Keprotec® upper with aramid fibres
Fitlock system integrates with lacing for enhanced midfoot support
Precision fit designed for technical running and racing
Suitable for shorter to middle-distance efforts in soft terrain
Lightweight construction for fast-moving performance

Technology:
Fitlock System: The integrated Fitlock system works together with the lacing to tighten the shoe around the inside and arch of the foot, helping create a more secure and personalised fit.
Schoeller®-Keprotec® Upper: Constructed with durable aramid fibres, the Schoeller®-Keprotec® upper provides excellent abrasion resistance and protection in harsh terrain.
Superior Contact Outsole: Made using VJ’s own specialised rubber compound, the Superior Contact outsole delivers reliable grip across slippery surfaces, muddy trails, and technical ground.

Specifications:
Activity: Orienteering, Trail Running, Swimrun, Obstacle Course Racing, Sky Running
Fit Scale: 3
Gender: Unisex
Midsole Stack: 29.5mm
Drop: 6mm
Outsole: Superior Contact
Upper: Schoeller®-Keprotec®
Lug Depth: 8mm
Weight: 240g (UK 8)

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The VJ-Sport IRock 4 is built for runners who need uncompromising grip and precision in soft, technical terrain. Now updated with a soft anti-slip heel, the latest IRock 4 delivers an improved fit that helps keep the foot secure even during demanding races and fast descents. Small refinements to the upper design further enhance comfort and hold, while the aggressive lug pattern continues to offer the exceptional traction the IRock range is known for. Designed specifically to perform in wet, muddy, and unpredictable conditions, the outsole sheds loose debris efficiently while VJ’s signature Superior Contact outsole and Butyl rubber compound provide outstanding grip across slippery surfaces. The durable Schoeller®-Keprotec® upper with aramid fibres offers excellent protection and abrasion resistance, while the integrated Fitlock system works with the lacing to secure the shoe around the arch for a more precise, locked-in feel. Lightweight and responsive on technical ground, the IRock 4 remains a favourite for orienteering, obstacle course racing, skyrunning, and trail running in softer conditions.

Features:
Updated soft anti-slip heel for improved fit and foot security
Aggressive outsole designed for soft and slippery terrain
8 mm lug depth for maximum traction in demanding conditions
Lug configuration helps shed mud and loose debris
Superior Contact outsole with VJ Butyl rubber for exceptional grip
Durable Schoeller®-Keprotec® upper with aramid fibres
Fitlock system integrates with lacing for enhanced midfoot support
Precision fit designed for technical running and racing
Suitable for shorter to middle-distance efforts in soft terrain
Lightweight construction for fast-moving performance

Technology:
Fitlock System: The integrated Fitlock system works together with the lacing to tighten the shoe around the inside and arch of the foot, helping create a more secure and personalised fit.
Schoeller®-Keprotec® Upper: Constructed with durable aramid fibres, the Schoeller®-Keprotec® upper provides excellent abrasion resistance and protection in harsh terrain.
Superior Contact Outsole: Made using VJ’s own specialised rubber compound, the Superior Contact outsole delivers reliable grip across slippery surfaces, muddy trails, and technical ground.

Specifications:
Activity: Orienteering, Trail Running, Swimrun, Obstacle Course Racing, Sky Running
Fit Scale: 3
Gender: Unisex
Midsole Stack: 29.5mm
Drop: 6mm
Outsole: Superior Contact
Upper: Schoeller®-Keprotec®
Lug Depth: 8mm
Weight: 240g (UK 8)

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