- Full speed ahead: Whether on rollers, skids, on a board or skis – the chest bag follows every track. Thanks to the high-tech material, the smartphone remains touch-enabled: a short tap on the display and the wild ride is immediately recorded. There are no limits to the areas of application, the bag goes to every limit and lets no speck of dust, raindrop, or snowflake inside. And thanks to the magnetic belt fastener, the bag is quick and easy to put on.