Review on Cat Ears AirStreamz Cycling Noise Reducer by Charles Salgado

The instructions have instructions for a loose or tight strap, but basically you just attach it to your helmet straps by threading the material around the Straps wrap and fasten with Velcro. If it's in the 'right' position it will have an effect, but the correct position can vary wildly depending on the wind etc. For my purposes, I regularly/constantly ride the Bay Trail, which is exposed to open water and crosswinds of 5-15 knots. There is no magic silence. Let's see how they hold up over time.