Fabric: 10D waterproof and tear resistant nylon. Inner material: 7D ultralight and soft nylon. Filling: 90% 800FP waterproof duck down. Regular size is about 210x80cm. Lengthen size is about 220x90cm. Vertical lining structure, zippered windproof wall, warm seams. Please note: due to the swelling property of down, it may cause errors in the size of the sleeping bag, which is a normal phenomeno.