Built for riders who push the limits of downhill, bike park, and gravity riding, the Troy Lee Designs D4 Polyacrylite Helmet delivers race-proven protection, exceptional ventilation, and all-day comfort in a durable, value-focused package. Incorporating technology and design elements developed from Troy Lee Designs’ flagship D4 platform, the D4 Polyacrylite offers premium performance for riders seeking confidence on the most demanding terrain.
The lightweight Polyacrylite shell is engineered for durability while maintaining a comfortable feel during long days on the mountain. Inside, strategically designed EPS impact foam helps manage energy from impacts, while the helmet’s deep coverage and full-face design provide comprehensive protection for aggressive riding disciplines.
A highly efficient ventilation system featuring front intake ports, internal airflow channels, and rear exhaust vents promotes continuous airflow to help keep riders cool during intense runs and long lift-assisted sessions. The D4 Polyacrylite also includes quick-drying, antimicrobial comfort liners and cheek pads that are removable and washable for lasting freshness and comfort.
Designed to integrate seamlessly with modern goggles and neck braces, the D4 Polyacrylite Helmet delivers the protection, fit, and performance serious gravity riders demand.
Features:
Lightweight and durable Polyacrylite shell construction
Full-face design for maximum downhill and gravity protection
EPS impact liner for effective energy management
Advanced ventilation system with multiple intake and exhaust ports
Internal airflow channels for enhanced cooling
Removable and washable antimicrobial comfort liner and cheek pads
Large eye port designed for optimal goggle compatibility
Compatible with most modern neck brace systems
Secure, comfortable fit for aggressive riding conditions
Ideal for downhill, enduro racing, freeride, and bike park use
Meets or exceeds applicable bicycle helmet safety standards
