To ensure optimal food safety, it’s crucial to understand proper storage techniques. Subway sandwiches, like other perishable foods, have a limited shelf life in the refrigerator. Generally, Subway recommends consuming sandwiches within 3-5 days of purchase, assuming they’re stored at temperatures below 40°F (4°C). Proper handling and storage practices are essential to prevent foodborne illnesses and maintain the freshness and quality of your Subway sandwich.