A total of youth football helmets have been evaluated using the STAR testing system. These tests assess each helmet’s ability to reduce both linear and rotational head acceleration from impact scenarios representative of youth football. Our lab tests are based on impact data collected directly from 10- to 14-year-old players wearing sensor-equipped helmets. Helmets with more stars are associated with lower concussion risk in these scenarios. We recommend choosing a helmet rated 4 or 5 stars.