Did you know that lettuces continue to "breathe" even after they've been picked? To keep your salad at the peak of freshness, our special breathable bags are designed to allow just the right amount of oxygen in and carbon dioxide to escape, preserving the perfect environment and just picked flavor and freshness. Since all salads are not the same, we've carefully matched the Fresh Express salad mix to a specific bag to maintain optimum freshness. After your Fresh Express salad is thoroughly washed, rinsed and gently dried, it is sealed in our Keep-Crisp® bag so you can enjoy long-lasting freshness - without preservatives.