Abstract: A technique for alerting a user of approaching moving objects from the side or rear includes a rear looking radar with audio alerts to the user. Feasibility of the Rear Looking Snow Helmet is shown using the skiing and snowboarding applications where variable frequency (distance related) audio alerts are provided to left and right earphones depending on the location of the approaching skier/snowboarder. The electronics driving the system are mounted in the skier's/snowboarder's helmet while two antenna elements are mounted on the rear of the helmet. A large ON/OFF switch is mounted on the helmet for easy access. We show feasibility of the concept using performance analysis and by proposing an implementation architecture for the skiing and snowboarding applications. We claim the system will meet an acceptable level of performance when parameters are varied and traded off and that the system is technology independent.