Glad Bags with FreshProtect II Plastic help keep food fresher. FreshProtect II Plastic is specially designed to maintain a balanced level of carbon dioxide and oxygen for high-respiring produce, to help keep produce such as broccoli, cauliflower, asparagus and corn fresher longer. FreshProtect II Plastic. The food storage bag from Glad, with Fresh Protect II Plastic to help keep your food fresher. Seals Securely. Yellow and blue make green seal, so you know it's sealed tight. Strong and Sturdy. Durable plastic safeguards your food for almost all occasions.