Weighing only 20 ounces, The Static V is one of the lightest camping pads on the market. Its innovative v-chamber design limits air movement and heat loss for better support and comfort. The Static V folds to fit in multiple bag types and sizes. The side rails keep you on the pad and well-insulated. Built with 75D polyester on top and bottom. Great for use inside a mummy bag, and also works well below your bag (works better below if your sleeping bag has pad straps).