Vacuum heat shrink bags are used for vacuum (body-fitting) shrink packaging of fresh meat. Vacuum shrink packaging bags have good moisture resistance. Compared with non-shrink products, they can improve the appearance of the packaged products, strengthen product protection, reduce blood and water seepage, and extend the shelf life of products. They are especially suitable for packaging of cold fresh meat, solid cheese, etc., and are ideal packaging materials for cold fresh food. They can be printed to meet customers' packaging requirements for color. Excellent oxygen barrier properties - block oxygen ingress (such as fresh pork, beef, meat products) Excellent aroma barrier properties - block aroma leakage (such as meat products, cheese) High water vapor barrier properties - keep the moisture of packaged meat products Excellent deep stretching thermoforming uniformity Highly transparent and high-gloss film appearance Low temperature resistance, suitable for frozen and refrigerated storage Reliable heat sealing performance to ensure the vacuum or inflated state of the package.