They are among our thickest and strongest Ralston brand garbage bags available. These bags have the ultimate strength, tear and puncture resistance to hold heavy trash at its maximum capacity. Certified not to leak, tear, or puncture easily. UL EcoLogo® Certified - UL-126 Garbage Bags. Manufactured from a virgin-rich blend of super hexene and recycled post-industrial resin. Perforated tabs on the side for individual bag dispensing.