This vango ultralite pro 100 sleeping bag is a fantastic choice of lightweight and really compact sleeping bag that offers an excellent level of warmth and comfort making it a great 2 season sleeping bag ideal for using during the warmer months the ultralite pro range has a trilateral construction which includes a thermal reverb which redirects heat radiated from the body back to you and has 4t synthetic insulation which is an innovative synthetic insulation that traps air into its patented chan