They might be transparent, but these bags are the furthest thing from fragile. Our 3 mil clear 55 gallon contractor bags have been made from the finest low-density plastic. They are 3 mil clear contractor bags, which means they can safely be used to dispose of nails, broken glass, splintered wood, and all the rough, dangerous debris generated on a construction site. Finished with an expanding gusset seal for extra space. These bags are also great for keeping items in long-term storage: the heavy gauge keeps everything safe, and with a clear bag you won’t have to guess at what’s inside.