Stretch film is typically made from polyethylene or polyvinylidene chloride. It is thicker and stronger compared to cling film, providing enhanced protection against punctures, tears, and shifting of goods. 

The thickness of stretch film ensures its durability and suitability for heavy-duty applications. It is available in various gauges to accommodate different load sizes and weights.

Cling film is primarily made from polyethylene. It is thinner and more flexible compared to stretch film. While cling film may not offer the same level of strength as stretch film, its self-clinging nature and 

static charge allow it to adhere tightly to surfaces, creating a secure and airtight seal around food items.