Pyramid Packaging is a supplier of competitively priced stock poly plastic bags. Polyethylene is the material used in most plastic bags. Polyethylene (poly) bags have good tensile strength, clarity, flexibility, moisture resistant, reusable and recyclable. Poly bags come in an array of sizes and gauges ranging from light weight 1 mil to extra duty 6 mil. Since we are stocking supplier, we keep a wide range of standard poly products in our Chicago warehouse. In most cases we can deliver next day or depending on your location even same day delivery can be achieved.