Western Mountaineering Antelope MF

The Western Mountaineering Antelope MF is a mummy bag rated to a -15°C (5°F) limit, using 680 g of 850+ fill power RDS-certified goose down inside a 20D MicroLite XP nylon shell. At 1,050 g total, it's built for genuinely cold three-season alpine trips rather than casual camping, and Western Mountaineering backs it with a 10-year warranty. This particular listing is the short-size version, fitting users up to about 167 cm — taller hikers should look at the regular-length Antelope models instead. An insulated draft collar and draft tube help seal warmth around the neck and zipper, standard cold-weather details on WM's mummy bags but worth having given how low the rating goes. At roughly 70 g of bag weight per degree of temperature rating, it's an efficient design for how warm it runs, though 1,050 g is still a serious cold-weather commitment rather than a lightweight three-season default. It ships with a stuff sack, and the 20D nylon shell keeps weight reasonable without the added cost of a waterproof membrane like the GWS version.