Outer cover material-premium 170T anti-tearing polyester fabric which is waterproof and Breathable.These are designed for 10 to 20 Degrees Celsius.Separated zipper at the bottom can also make your feet often come out through the wind. Half-circle hood with adjustable drawstring keeps your head warmer.It's a perfect sleeping bag for outdoor camping trips, Boy Scouts or mountain hiking,also works as camping comforter.It's also a great way to expand your brand.Welcome to your inquiry!