Premium Material: The large cold shipping boxes are made of lightweight, strong and leakproof materials, which c an retard all forms of heat transfer to keep perishables in good condition. Economical: The perishable food cooler is lightweight, reusable, recyclable, sturdy. It’s more cost-effective than a foam shipper. Widely Use: 15x10x11 insulated food box is ideal for packaging or mailing breast milk preservation, meat preservation, cold storage of medical supplies and other’s perishables. Dimension: The inner size of the styrofoam mailing box is 15 x 10 x 11 inches (L x W x H). Thickness of insulation bag is 3mm. Liner bag is precise to fit the box. You can better to know what size items can fit inside. Crushproof: These shipping coolers are quick to construct with packaging tape. Ensure frozen food safety. Premium Material: The large insulated box for cold shipping is made of lightweight, strong and leakproof materials, which c an retard all forms of heat transfer to keep perishables in good condition. Economical: The perishable shipping box is lightweight, reusable, recyclable, sturdy. It’s more cost-effective than a foam shipper. Widely Use: 15x10x11 box for shipping frozen food is ideal for packaging or mailing breast milk preservation, meat preservation, cold storage of medical supplies and other’s perishables. Dimension: The inner size of the cooler shipping box is 15 x 10 x 11 inches (L x W x H). Thickness of insulation bag is 3mm. Liner bag is precise to fit the box. You can better to know what size items can fit inside. Crushproof: These shipping coolers are quick to construct with packaging tape. Ensure frozen food safety.