evo.com | Troy Lee Designs Bike Helmets > TheTroy Lee Designs Flowline MIPS Bike Helmet improves upon the legendary A1, with more features at a lower price. Known for superior fit and comfort, Troy Lee Designs has outdone themselves with this half shell, updating-but maintaining-their signature style. MIPS, ventilation, and dialed looks, this is the best entry level helmet they've ever offered. Long live the A1, and all hail the Flowline! Extended Coverage Enduro Design 14 Hi-Flow Ventilation Ports Polycarbonate Microshell Pinch Clasp Closure MIPS B32 Solution Integrated into Retention System | Kid's Troy Lee Designs Flowline Bike Helmet 2025 - Fits All in Gray