When you only have so much room in your backpack or locker this Kids Insulated Down Alternative Packable Jacket can basically fit in anywhere. Not only is it small enough to fit in a backpack's side water bottle holder it's warm and water resistant. Pack it in pack it out.Once the bell rings at the end of a day your kids' puffy jacket is ready to bounce back to do what it does best: retain heat and keep them comfy all day.The down alternative is a synthetic material (PrimaLoft Insulation Thermoplume) which takes on the same characteristics as down does.