I always wear a hat or visor when running. Without wishing to add to much detail… I sweat and I tend to sweat quite considerably. A good head product stops all that salty liquid running into the eyes and causing irritation. I typically have a preference for a Visor and I have to say that the Arc’teryx ‘Neutro‘ Visor is the best on the market for me. For testing purposes though I was using the Accelero Cap. The cap is short brimmed and highly breathable with mesh side panels. It has the all-important comfortable sweatband that caused no irritation and at the rear it has an adjustable stretch closure with a quick release buckle. Considering I was using this hat in the mountains with 30 deg temperatures and I was running up a 30% incline I found the hat incredibly comfortable and cool, even with the heat absorbing black colour.