Trash can liners are made of resin which is the basic raw material used in manufacturing trash can liners. The two basic types of resins utilized in trash can liner manufacturing are high density and low density. High Density Can Liners are great for paper and lightweight trash; tears easier if punctured. They are an excellent choice for offices or bathrooms, as long as no sharp or irregularly-shaped objects are being discarded. Lighter construction means lower freight, storage, and warehousing costs. Superior vapor and moisture protection; USDA and FDA approved for food use to help contain unpleasant odors. Temperature-resistant from -40 to 212 degrees Fahrenheit. Low Density Can Liners are great for heavy, wet trash; provide exceptional resistance against puncturing and tearing. They are an excellent choice for kitchens, yard waste and other trash with sharp, jagged edges. Superior stretch properties make for a great multi-purpose can liner.