Troy Lee Designs D4 Polyacrylite MIPS Full Face MTB Helmet

The Troy Lee Designs D4 Polyacrylite MIPS brings the protection, fit and race-inspired design of the legendary D4 platform to a more accessible price point.

Designed for downhill, enduro, BMX and bike park riding, the D4 Polyacrylite features a tough polyacrylite shell combined with MIPS protection technology to help reduce rotational forces during certain angled impacts.

Its full-face design provides the coverage needed for aggressive gravity riding, while extensive ventilation helps manage heat during long days on the bike. The D4's carefully developed fit keeps the helmet secure and comfortable when riding fast through rough terrain.

Key Features

• MIPS rotational impact protection system
• Durable polyacrylite shell construction
• Full-face protection for aggressive riding
• D4 race-inspired helmet platform
• Excellent ventilation and airflow
• Comfortable interior padding
• Secure, performance-focused fit
• Designed for downhill, enduro, BMX and bike park riding
• Troy Lee Designs styling and finish

D4 Protection Without the Carbon Price Tag

The D4 Polyacrylite MIPS is an excellent option for riders who want the fit, coverage and design of Troy Lee Designs' premium D4 platform without stepping up to a carbon-shell helmet.

Whether you're racing downhill, hitting bike park laps, riding enduro or looking for additional protection on an e-MTB, the D4 Polyacrylite provides serious full-face coverage in a proven gravity helmet platform.