Description
Specifications:
– S3 safety rating
– SRC slip resistance
– Waterproof
– Black mesh/leather upper with scuff cap and kickplate
– Anti Static
– Oil resistant
– 300oC temperature resistant outsole
– Composite toe cap
– Composite midsole
– Gravity TRX2 high performance outsole
– Poron Performance Cushioning
Safety Standard
- EN ISO 20345:2011
- Safety rating: S3 WR SRC HRO
What this means:
- S3 = toe protection + puncture-resistant midsole + water-resistant upper
- WR = fully waterproof construction
- SRC = highest slip-resistance certification
- HRO = heat-resistant outsole
Designed for:
- Construction
- Outdoor trade work
- Utility engineering
- Warehousing
- Groundworks
- Harsh weather conditions
Waterproof Construction
One of the key upgrades over the lightweight Urban series.
Features:
- Waterproof membrane lining
- Waterproof mesh/leather upper
- Water-resistant seams and construction
Real-world benefit:
Keeps feet dry in:
- Rain
- Mud
- Wet construction sites
- Winter outdoor conditions
Midsole Protection
- Composite anti-penetration midsole
- Approximately 1100 Newton penetration resistance
Practical use:
Protects against:
- Nails
- Screws
- Sharp debris
- Construction waste
Unlike steel midsoles, the composite plate flexes more naturally when walking, making the boot more comfortable over long periods.
Gravity TRX2 High-Performance Outsole
This is one of the main performance features of the 4121.
Features:
- Gravity TRX2 anti-torsion outsole
- Deep aggressive tread
- Ladder grip support
- SRC slip resistance
- Oil resistant
- Heat resistant to 300°C
Real-world effect:
- Better grip on mud, gravel, and uneven terrain
- Improved ankle and foot stability
- Better traction on ladders and wet surfaces
- More supportive than sneaker-style work boots
The sole is designed more like a technical hiking boot than a standard warehouse shoe.
Upper Construction
- Black mesh/leather upper
- Reinforced scuff cap
- Heel kickplate
- Breathable mesh panels
Real-world benefit:
- More durable than lightweight trainer-style safety boots
- Better abrasion resistance
- Improved airflow compared to full leather boots
- Toe reinforcement helps during kneeling and site work
The combination of mesh and leather helps balance breathability with toughness.
