Hello ! Yes, they are really useful. They protect against dust and moisture, and most importantly, they help to keep the shape of the hat. I bought it once, and I can’t imagine my life without them. I used to choose in home stores, but in fact it was very stupid on my part, these boxes were of poor quality and inconvenient, later I found a popular online resource, and if you If you need one recommended place, check out Amazon. There is a wide selection of boxes in different sizes and designs, and they often have good reviews from customers. I have been using only their boxes for over a year, this was definitely a better decision.