Had a fall off my bike yesterday whilst competing in the sportive. Air ambulance had to take me to hospital and said this product saved my life. I hit a pothole at 30 MPH. It was that deep that the front wheel never exited. Straight over the handlebars on to head and somersaulted on to lower back, hip, and pelvis. Pleas read the spec as that’s how I came to the decision that this was the correct helmet to wear.