Bought these because my 14 year old daughter helps mow the lawn, and her younger siblings like to ride on the mower as well and I wanted to protect their hearing. They comfortable adjust to fit everyone from a 3 year old to an adult. Note, I would not buy these for an adult, but they were able to share enough that I could wear them for a short period. As for sound blocking, I used these when we were driving concrete nails into a slab using .22 caliber charges. It blocked the nose adequately. Are there better noise blocking options out there with nicer features, yes. Do these do everything I expected at a great price point, yes. We have had them for about two months and so far they have held up well. Would buy again