Dabbawalla Lunch Bags are crafted from eco-sponge, an innovative neoprene-like fabric that has earned the rigorous Oeko-Tex 100 standard of safety in textiles, an ecological certification process that tests for over 100 harmful substances. The insulated fabric is stain-resistant and helps retain food temperatures. Completely machine-washable! Machine-washable (lay flat to dry) and stain-resistant. When not in use, bags roll up for easy storage. Well-designed features include cushioned handles, reinforced seams for added strength, wide zipper openings, and inside pockets for stashing gear. Ideal for school lunches or toting snacks to the park. Great for taking bub out with bottles and snacks. Integrated easy-to-grip handle on top. Insulating construction holds temperature for hours interior ice pack pocket for longer outings. Lightweight. Stands upright for easy inside access. Outside back pocket. Two inside mesh pockets. Designed in the USA and responsibly sewn in Taiwan by a woman-owned and operated facility that supports fair labor practices. Each bag is crafted individually, and may have subtle differences which add to their unique charm.