1) Oxygen Protection Regular plastic bags and Ziploc plastic bags in seeps oxygen back into food products and does not provide any light protection compared to Mylar Bags. Oxygen and sunlight can cause discolorations, loss of taste, compromise product freshness and allow insects to breed. Mylar Bags provides an effective oxygen barrier to help preserve your food longer while maintaining its freshness. The thicker the Mylar Bag, the lower the oxygen transmission rate. 2) Light Protection Some types of food are more sensitive to light. When exposed to light, the temperature of the product can increase. Oil based products such as nuts, biscuits, crisps, and chocolate will be more vulnerable to rancidity and discolorations. Mylar Bags that are 4.0 and above can completely block out light. By keeping the light out, the product can stay cooler and reduce the risk of rancidity. 3) Odour Most foods absorb odour, which affects the taste of food products and the viability of your food storage. Plastic and paper absorb Odour which can affect the quality of your food storage. Mylar bags are laminated to aluminum which creates an oxygen barrier that prevents contamination against odour and gases. 4) Moisture Protection Moisture can destroy your food when in storage. Dampness created by moisture can cause mould, fungus, insects, and bacteria to thrive and negatively affect your food. Mylar Bags are laminated in several layers with aluminum foil and are waterproof. Food stored in a properly sealed Mylar Bag would remain completely dry from any external water sources.