Encell Cooler Bag Insulated Sports Baby Travel Lunch Bag Can be used for 4 hours alone, 12-16 hours with ice packs. 2-4 hours to keep warm, 3-6 hours with heat bag Adjustable shoulder strap for carrying comfort Multi-pocket design Heat sink of strap handle provides you a humanization design releasing your hand and shoulder far away from stress bunk independent space provides a large storage space