This insulated lunch bag is made of high-quality oxford cloth, which is wear-resistant and durable with a long service life. The inner layer is equipped with aluminum film material, which has excellent heat preservation and freshness locking effect, effectively achieving 4 hours of cold preservation and 8 hours of freshness preservation. The bag measures 11.4 inches in length, 8.3 inches in width and 10.24 inches in height, with a weight of only 0.73 lbs. The large-capacity design can easily hold lunch boxes, insulation buckets and other items, and is equipped with a detachable shoulder strap for excellent portability, making it an ideal choice for commuting, school, outdoor picnics