Ultra-light: Whether the choice of fabric or down，AIR is measured by whether it is light enough，AIR choose 800PF ultra dry down，the fabric is ultra-light 10D nylon.

Air can be perfectly spliced：Air sleeping bag hat part adds width, fully expanded to can be used as a pillow, and tighten draw string can be completely wrapped around the head, make the AIR can be used as a standard mummy sleeping bag.Upgraded down channel: the angle of the velvet channel of the air has been optimized and adjusted, so that the velvet can be better adsorbed on the sleeping bag, which is not conducive to the formation of cold spots;

The air down channel is a zoned design, the knee for the horizontal down channel chest and feet for the vertical down channel, even if you turn your body during sleep, the sleeping bag is very difficult to form a cold spot, thus enhancing the warmth of the sleeping bag.The Air has excellent water resistance: the air is made of water-repellent velvet, which can keep the sleeping bag dry even if it is used for a long time to provide a comfortable sleep.