Troy Lee Designs 2023 Flowline SE MTB Helmet - MIPS The all-new Flowline SE Helmet is handpicked, literally, by the pros and for good reason. The Flowline SE Helmet features all the same marquee accolades as the Flowline Helmet including an NTA 8776 E-Bike Certification and Virginia Tech 5-Star Safety rating but with upgrades. Premium details like a fidlock magnetic buckle, Anti-Microbial Quick Dry comfort liner, dual density EPS and more make Flowline SE the premium choice for any rider looking to hit their local trails or cruise the streets on their e-bikes.