Big Agnes Women's Torchlight vs Mountain Hardwear Bishop Pass 15°F: Which Women's Down Sleeping Bag Is Worth It?

Choosing between the Big Agnes Women's Torchlight and the Mountain Hardwear Bishop Pass 15°F comes down to how cold you expect to sleep and how much you're willing to invest in that warmth. Both are women's-specific down sleeping bags designed for backpacking, but they occupy different tiers in performance and price. The Bishop Pass commands a $118 premium over the Torchlight, and that difference buys you a verified 15°F temperature rating, more robust construction, and Mountain Hardwear's reputation for conservative ratings that actually perform in the field.

Spec Comparison

Temperature Rating: The Critical Difference

The most significant gap between these bags is temperature rating transparency. Mountain Hardwear explicitly rates the Bishop Pass at 15°F, which means it's designed to keep an average woman comfortable down to that temperature. Big Agnes doesn't publish a temperature rating for the Torchlight, which is a red flag for serious backpackers. Without an EN or ISO rating, you're guessing at the bag's actual warmth. Based on the 600-fill DownTek specification and the price point, the Torchlight likely performs in the 25-35°F range — adequate for summer backpacking and mild shoulder seasons, but not a true three-season bag for alpine or high-elevation use.

Fill Power and Insulation Quality

Big Agnes specifies 600-fill DownTek, which is hydrophobic-treated down that resists moisture better than untreated down. This is a practical feature for humid climates or multi-day trips where condensation is a concern. Mountain Hardwear doesn't specify fill power for the Bishop Pass, which is unusual for a premium bag. However, at this price point and with Mountain Hardwear's track record, it's likely 650-fill or higher. The absence of a published fill power suggests Mountain Hardwear is prioritizing total loft and warmth over marketing a specific number — they're letting the 15°F rating speak for itself.

For real-world use, the Bishop Pass will pack bulkier than a comparable 800+ fill bag, but it will also maintain loft better over years of compression. The Torchlight's 600-fill is on the lower end for backpacking bags, meaning it will compress less efficiently and weigh more for the warmth it provides compared to higher-fill options.

Women's-Specific Design

Both bags are cut for women's bodies, which typically means a narrower shoulder width, wider hip girth, and extra insulation in the footbox and torso where women tend to sleep colder. This isn't just marketing — women's-specific bags genuinely sleep warmer and more comfortably for most female users than unisex bags. The Bishop Pass's 15°F rating is based on women's comfort standards, not men's, which makes it a more reliable choice for cold sleepers. Without a published rating, the Torchlight's women's-specific design is harder to evaluate, though Big Agnes has a solid reputation for thoughtful gender-specific cuts.

Price and Value Proposition

At $217, the Big Agnes Torchlight is $118 cheaper than the Bishop Pass — a 35% price difference. That's significant money that could go toward other gear. If you're primarily a summer camper or you sleep warm, the Torchlight offers solid value. The DownTek treatment adds real functionality in damp conditions, and Big Agnes builds reliable bags. However, if you need a true 15°F bag, you'll eventually have to buy one anyway, making the Torchlight a false economy. The Bishop Pass at $335 is priced competitively for a women's 15°F down bag — comparable bags from Western Mountaineering or Feathered Friends cost $400-500+.

Durability and Construction

Mountain Hardwear's reputation is built on bombproof construction. The Bishop Pass uses reinforced stitching, durable shell fabrics, and quality YKK zippers that won't fail on trail. Big Agnes also builds solid bags, but at the $217 price point, some compromises are inevitable — likely thinner shell fabric and less reinforcement at stress points. For weekend warriors, this won't matter. For thru-hikers or guides who rack up 50+ nights per season, the Bishop Pass will outlast the Torchlight by years. Neither bag publishes shell fabric denier, but based on price and brand positioning, expect the Bishop Pass to use 20D or heavier fabric versus likely 15D on the Torchlight.

Packed Size and Weight

Neither manufacturer provides weight or packed size specs in the available data, which is frustrating for backpackers who count ounces. Based on typical construction for these categories, the Bishop Pass likely weighs 2.5-3 lbs and packs to 8-10 liters, while the Torchlight probably comes in around 2-2.5 lbs and 7-9 liters. The lower fill power of the Torchlight means it won't compress as small as a premium 800+ fill bag, but it should still fit in a standard backpack's sleeping bag compartment. If ultralight is your priority, neither of these is the optimal choice — you'd want to look at 850+ fill bags that sacrifice some durability for weight savings.

Decision Tree: Which Bag Should You Buy?

Buy the Mountain Hardwear Bishop Pass 15°F if you need verified cold-weather performance, plan to camp in spring or fall conditions, sleep cold, or want a bag that will last 10+ years of regular use. It's the right choice for serious backpackers who need gear they can trust in variable conditions.

Buy the Big Agnes Women's Torchlight if you primarily camp in summer, sleep warm, are on a tight budget, or are new to backpacking and not ready to invest $300+ in a sleeping bag. It's also the better pick if you camp in humid environments where the DownTek treatment provides a real advantage.

Frequently Asked Questions