The Yeti Passion One Down Sleeping Bag [$675]. With it’s ankle-length zip fastener, lowest weight and pack size, there’s definitely plenty of room left to sleep. With a weight of 25g/sqm, the Yeti Rip Stop nylon fabric is still extremely tearproof. Thanks to the calendered manufacture of the fabric, good wind- and water-proof characteristics are achieved as well. The high-quality filling is gained from extremely large Masurian (Poland) breeding geese.