Mountain Hardwear Women's Bishop Pass™ 30F/-1C

The Mountain Hardwear Women's Bishop Pass 30F/-1C is the mildest and lightest bag in the Bishop Pass down line featured here, rated to -1°C comfort and -7°C limit under EN ISO 23537 — a warm-weather bag rather than a shoulder-season all-rounder. At 870 g with 420 g of RDS-certified duck down (650 fill power), it is noticeably lighter than its higher-warmth siblings, a direct result of the reduced fill weight and choices like a three-quarter-length zipper instead of a full-length one. Those choices carry trade-offs: the bag omits the draft collar found on warmer Bishop Pass models, which slightly reduces heat retention around the neck but keeps weight down. A draft tube along the zipper still limits drafts through the closure itself. At a weight-per-degree of 124.3 g, it is less thermally efficient by that metric than the colder-rated bags in the family, expected since a shorter zipper and less down mean proportionally more shell relative to warmth. This bag suits warm three-season trips and summer alpine camping where minimizing pack weight matters more than deep-cold margin.