Strong resin blend is designed for toughest use, holds up to 200 lbs! Heavy, strong Kraft cartons One size footprint for cartons of various quantities/sizes maximizes stacking strength Two-ply for uniform sidewall strength. Silver/Black color hides contents. Flat bottom increases capacity up to 20% over star bottom bags, prevents bottom seal weak spots. Liners individually folded and dispensed. Twist ties included.