Troy Lee Designs SE4 Moto Helmet The SE4 Polyacrylite Helmet comes with MIPS, incorporating brain rotational protection. This helmet comes with 16 intake ports to channel cool air around and over a rider's head, forcing hot, sweaty air out through six rear exhaust ports. Troy Lee Designs TLD SE4 Polyacrylite Helmet Features Light on weight but not on protection, the 1500g SE4 Polyacrylite incorporates the Mips brain protection system with safety features such as 3D cheek pads designed for emergency removal, break-away plastic visor screws, and an EPP chin bar. With 16 intake ports channeling airflow through 6 exhaust ports, SE4 continues to be at the head of the pack for safety and comfort. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Troy Lee Designs Cole Seely SE4 Helmet Testimonial The SE4 Polyacrylite Helmet comes with MIPS, incorporating brain rotational protection. This helmet comes with 16 intake ports to channel cool air around and over a rider's head, forcing hot sweaty air out through six rear exhaust ports. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Troy Lee Designs Pierce Brown SE4 Testimonial Pierce Brown takes a look at the SE4 Moto Helmet. The SE4 Polyacrylite Helmet comes with MIPS and 16 intake ports. The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked. Motocross Helmets SE4 Helmet Add to Cart GP Helmet Add to Cart SE5 Helmet Composite Buying Options SE5 Helmet Carbon Buying Options Price $129.95$129.95 $195.00$195.00 — — Shell Material Polyacrylite Polyacrylite Composite Carbon Discipline Track Off-Road, Dual Sport Track Track EPP Chin Bar ✔ ✔ ✔ ✔ 3D Contoured Cheek Pads ✔ ✔ ✔ ✔ Youth Size Available ✔ ✔ ✘ ✘ What is MIPS? MIPS is a safety technology that adds a low-friction layer inside the helmet that can move slightly during an impact, helping to reduce the rotational force on the head and lowering the risk of brain injury. Can I purchase helmet accessories and parts separately? Yes. We offer a full range of replacement parts, including visors, padding, and more.