Walker's Razor Slim Electronic Muff

I bought these specifically for attending a NASCAR race. I do NOT recommend them for races. Fit: They were somehow simultaneously too big and too small for my head. Admittedly, I have a larger than average head for a female and I wear glasses. They were too tight on my head and two days later, I am still sore where they were pressing against the ear piece of my glasses. But they were too large and I couldn't keep the earpieces comfortably covering my ears and have the head band snug against my head. Function: They were great until the cars started moving. Once the cars started moving, all I could hear was wind. I was sitting in close proximity to a speaker and couldn't hear the announcers. I couldn't even hear my friend sitting next to me. I eventually turned them off and they just functioned as normal hearing protection. I would recommend using ear plugs in addition to the muffs in this situation. I did test them out at home when they arrived. I had my dog bark, I clapped my hands, and they worked as designed. I'm sure they will be great on the range when they do not have to stay on for several hours and the loud noise is not ongoing.