Thoroughly washed. Ready to eat. No preservatives. Why We're so Fresh: To guarantee Fresh Express Salads are consistently, deliciously fresh, we: Cool our salads within hours of harvest and keep them chilled from field to store. Thoroughly rinse and gently dry; then seal them in our Keep-Crisp bag to maintain freshness. Deliver fresh salad daily. Leafy Green Romaine is an excellent source of vitamin K & folate. Vitamin K contributes to maintenance of normal bone. Folate contributes to normal maternal tissue growth during pregnancy.