These heavy grade high density trash bags are 16 microns thick. If you’re not throwing away anything super sharp, garbage bags made from High Density Polyethene (or HDPE, if you like) are a really smart choice for kitchens, bathrooms, or offices. Because they can hold so much weight in spite of being thinner than your average germ, high density can liners work well with wet trash, like food waste. They also cost quite a bit less than their low-density counterparts, because they use a lot less material when they are made.