Mountain Hardwear Shasta™ 0F/-18C

The Mountain Hardwear Shasta 0F/-18C takes a different approach from the rest of the Phantom line: it uses Thermal.Q Recycled synthetic insulation instead of down, in a 20D ripstop polyester shell with DWR treatment. Synthetic fill keeps performing when damp — a real advantage over down in wet winter conditions or condensation-prone shelters — but it comes at a weight cost, and at 2075 g this bag is nearly double the weight of Mountain Hardwear's down-filled Phantom 0F/-18C at a similar temperature rating. Ratings are manufacturer-stated rather than independently EN/ISO-tested, at -9°C comfort and -18°C limit. Internal length runs to 218 cm with a 157 cm shoulder and 140 cm hip width — a roomier cut than the brand's down bags, fitting users up to 182 cm with more space to spare. The two-way zipper, adjustable fitted hood, draft collar, draft tube, and internal pocket cover the usual feature set. This bag suits winter car camping, hut-based trips, or backpackers who prioritize wet-weather reliability and lower cost over minimizing weight — not a pick for anyone counting grams toward an ultralight base weight.