Simple instructions : 1.Fill bag no more than three-quarters full. 2.Squeeze out air. 3.Fold down top of bag at least three times. 4.Pull together buckles at each side and snap closed 5.Pull up on closed buckle to use as a handle. Go back to school, office, or out to play with your lunch, snacks, and beverages coolly stored in the Ariel Edge Cooler/Lunch Bag. This lightweight, durable and compact insulated lunch bag is made elaborately of durable 300D Polyester, insulated with the PVC material. Besides, the insulated lunch bag also includes a front pocket, convenient for storing napkins, condiment packets or frequently-needed items. The bag top can be folded depends on the stuff on the bag and when you pull up on closed buckles, which the strap is adjustable also can be used as a handle when it's adjusted to shortest, easy to carry..Dimension:7.5in ch(Length) X13 inch(width)X6 inch Height.The roll top that allows me to snug up the contents of my bag and reduce shifting and spilling. The large-ish base of the bag that allows multiple containers to sit side-by-side in the bottom of the bag and reduces the need to stack containers (which invariably fall over and leak). The snap closure that creates a built-in handle. The water-proof and wipe-able/washable liner. The sophisticated (not childish or silly) fabric choice.You will feel like an adult carrying my lunch in an adult lunch bag.