Bedrock -20° Long vs Wolverine 20°: Which Cold Bag Fits?

By Sleeping Bags, Tents, Pads & Outdoor Gear | Published: 2026-11-01

Category: Comparisons

A cold-weather sleeping bag comparison of the Bedrock -20° Long and Wolverine 20°: temperature ratings, fit, and fill differences that decide which bag suits your trip.

Quick answer

Choose the Bedrock -20° Long for genuine winter camping and cold-weather hunts where you need a -20°F mummy bag with 650-fill water-repellent down. Choose the Wolverine 20° for kids and teens who need a durable 20°F youth bag that stays put on their pad.

Temperature rating is the first filter

The Bedrock is rated to -20°F, while the Wolverine is rated to 20°F. That 40-degree gap is the single biggest difference between these bags: the Bedrock is built for sub-freezing nights, and the Wolverine is built for three-season youth camping. Neither rating is a guarantee of comfort for every sleeper, but it tells you which bag belongs in which season.

If you are planning a winter camping sleeping bag setup, the Wolverine's 20°F rating will not be enough on its own. If you are outfitting a child for summer camp or mild-weather trips, the Bedrock's -20°F rating is more insulation than you need.

Fill and construction trade-offs

The Bedrock uses 650-fill RDS Certified water-repellent treated down, baffled construction to distribute heat, and YKK #5 zippers. Down packs small for its warmth, but it needs more careful care than synthetic fill and costs more. The Wolverine's catalog entry does not list fill type or temperature-testing details, so treat its 20°F rating as the main guide and ask about fill if you need to know how it handles damp conditions.

The Wolverine is designed with the Big Agnes PadLok Sleep System to keep a restless sleeper on top of their pad. That is a practical feature for kids who roll around at night, and it is the kind of detail that matters more for a youth bag than a spec-sheet fill number.

Size and fit: long vs youth sizing

The Bedrock -20° Long is a long-size mummy bag, so it suits taller adults and people who want extra room at the foot. Mummy bags are efficient at trapping heat, but the long cut adds length and a little weight compared with a regular. The Wolverine comes in sizes for tots, kids, and teens, so it is built around growing bodies rather than adult dimensions.

A long sleeping bag fit is not just about height. If you are near the top of a regular bag's range, the Long version of the Bedrock gives you room to wear a layer inside without compressing the insulation. For a child, the Wolverine's youth sizing reduces empty air space that would otherwise need warming.

Trade-offs to weigh

Warmth vs. weight and pack size: The Bedrock's -20°F rating and 650-fill down give you winter-ready warmth in a packable mummy shape, but that comes with more bulk and a higher price than the Wolverine. The Wolverine's 20°F rating is lighter and simpler for mild nights. Match the rating to your coldest expected night, not the average.
Adult long fit vs. youth sizing: The Bedrock Long is cut for taller adults and extra layering room; the Wolverine is cut for tots, kids, and teens. A long adult bag on a small child wastes heat, and a youth bag will not fit most adults. Measure the sleeper's height before choosing a size.
Down care vs. kid-friendly durability: The Bedrock's down fill needs washing with down-specific care and thorough drying to keep its loft. The Wolverine's catalog entry does not specify fill, so confirm care instructions before buying for a child who may get it dirty. Down rewards care with longevity; youth bags often see rougher use.

Product facts

Bedrock -20˚ Long: Rated to -20°F with 650-fill RDS Certified water-repellent treated down, baffled construction, and YKK #5 zippers. This is a true winter bag for cold, dry nights, and the water-repellent down gives it some margin in damp conditions.
Bedrock -20˚ Long
Wolverine 20°: A 20°F youth bag available in sizes for tots, kids, and teens, with the Big Agnes PadLok Sleep System. It keeps young, restless sleepers on their pad and scales with a growing child, but it is not a winter bag.
Wolverine 20°

Which bag fits your trip?

Best for

Winter camping and cold-weather hunts where nighttime temperatures drop well below freezing
Taller adults who need a long mummy bag with room for a base layer
Campers who prefer packable down insulation and accept its care routine

Not for

Kids and teens who need a 20°F bag for summer camp or mild-weather trips
Budget-focused buyers who do not camp in sub-freezing conditions
Anyone who wants a simple, low-maintenance bag for warm-weather use