Because Hi-Tec 7-Layer stretch film is better. It is stronger and wraps pallets tighter. And even though it is thinner, it stretches more than conventional stretch films. Try a sample, compare it to your current film. Don’t go by the thickness, the strength is in the composition not the gauge (thickness). Stretch wrap strength is no longer measured by gauge, it is measured by a combination of force to load (how tight the pallet is wrapped) and puncture resistance.