Review on Sackorange Sanding Washable Reusable Glasses by Jeffrey Sanders

I bought this to do a little sanding on my 3D printed cosplay helmets when painting and finishing. I had one from the local hardware store that worked fine so I figured they would be just as good. Unfortunately, they seem to run out of power very quickly. After a little use, the material seems to fill the space in the sand, rendering the sponge useless. I will use them until I can, but I will not buy this product again.