The YETI Thin Ice Pack is a ground-breaking innovation designed to be nearly 50% slimmer than YETI ICE and engineered to completely replace the need for regular ice inside your Coolers and Lunch Bags. That way, you don't have to choose between saving space and keeping your goods fresh for as long as possible. Even more, it's built to be lightweight, so you won't feel held back when you're trekking through puddles or hiking up hills.