This video compares ESD Shielding bags and Pink Poly bags. The differences between these bags consist of bag construction and performance.
The static shielding bag construction is multi-layer. The inside of the bag is antistatic polyethylene that restricts tribocharging. The middle layer is a metal layer that is less than 1 x 10^3. The outer-layer is a polyester layer that gives tensile and puncture strength. The outside of the bag is a non-generating, antistatic layer.