The Mountain Equipment Adult Helium GT 400 Sleeping Bag offers a light, versatile, and highly packable solution for summer and cooler spring nights. Filled with 90-10 Pure Duck Down with a minimum fill power of 700, it provides exceptional warmth and comfort. The roomy GT fit and anatomically shaped hood, combined with slanted box-wall baffles and mid-level side seams, ensure optimal comfort and adaptability for various sleeping positions. Ideal for backpacking and travel. Mountain Equipment Adult Helium GT 400 Sleeping Bag