Stretch film roll is predominantly made from linear low-density polyethylene (LLDPE), a material known for its high tensile strength and flexibility. This plastic film is designed to stretch when applied around items, forming a tight, secure seal. 

The stretchability of the film ensures that it can accommodate various load sizes and shapes, making it a universal packaging solution. Its primary function is to keep items on pallets stable, prevent shifting, and protect against environmental factors like dust and moisture.