the Surface of This Large Capacity Thermal Insulated Backpack Rucksack is Made of Polyester Fabric, Which is Strong & Wear-resistant. with a Capacity of Up to 35l, You Can Hold a Lot of Stuff. Its Thermal Insulation Performance is Good, Can Ensure the Freshness of Food. Open the Backpack Rucksack, the Top of the Snack Bag, the Middle Bag Can Store Food. the Side Pocket Can Hold the Table Cloth on One Side & the Wine on the Other. Theres a Small Compartment Right in Front for Plates & Forks. the Shoulder Strap is Firm & Soft, Easy to Carry on the Body. You Can Take It with You When Camping, Barbecuing, & Going Out for Fun. Minimum Quantity: 500