What temperature range is this sleeping bag designed for?

This bag carries a 20-degree Fahrenheit comfort rating, making it suitable for three-season backpacking and cool-weather camping. Your personal warmth will vary depending on factors like what you wear to bed, the insulation under you, and whether you sleep warm or cold naturally.

How does 1000 fill power compare to lower fill ratings?

Fill power measures how much space one ounce of down occupies when fully expanded. Higher fill power means more loft and warmth per ounce, so 1000 fill power down provides the same insulation as lower grades while weighing less and compressing smaller. It's the lightest option for serious backpackers.

Can I adjust the insulation distribution inside the bag?

Yes. The continuous horizontal baffles allow you to shift down toward your feet or redistribute it evenly along the length of the bag. This lets you adapt to changing temperatures or personal preference without adding or removing layers.

How should I care for a down sleeping bag?

Store it uncompressed in a large breathable sack to maintain loft. When washing is needed, use a front-loading machine with down-specific detergent and tumble dry on low heat with clean tennis balls to break up clumps. Avoid long-term storage in the compression sack.

What's the difference between the size options?

Short, regular, and long sizes correspond to different body heights and provide appropriate bag length. A properly sized mummy bag should extend a few inches past your head and feet without leaving excessive empty space, which you'd have to heat unnecessarily.

20-Degree Mummy Bag

The 3-second version

1000 fill power goose down with water-repellent treatment
3D baffles expand to 2.75 inches for efficient heat retention
Ultralight 7-denier ripstop shell compresses small
Down loses insulation when wet
Delicate 7D fabric needs gentle handling
Mummy cut may feel snug for restless sleepers

Why it's on GiftsFeed

20-Degree Mummy Bag

Most sleeping bags at this temperature rating either weigh too much or compress poorly because they use lower-grade insulation or thicker fabrics. This one pairs 1000 fill power down with a 7-denier shell, so you get warmth that packs down to the size of a water bottle instead of a football. The horizontal baffles mean you can push extra fill toward your feet on a frigid night or spread it evenly when conditions moderate, a level of control that sewn-through construction can't match. Worth it if you count ounces on multi-day trips and need a bag that adapts rather than forcing you to layer up or sweat.

Good gift when

Backpackers who prioritize low pack weight and small packed size
Cold sleepers tackling three-season or shoulder-season trips
Anyone logging serious trail miles where every ounce matters

Skip it if Down insulation loses warmth when wet, so if you camp in consistently damp conditions or prefer low-maintenance synthetic fill, a different bag will serve you better. The ultralight shell fabric also demands careful handling around sharp objects and rough surfaces.

Specs

Temperature Rating: 20°F
Insulation: 1000 fill power grey goose down with DWR finish
Shell Material: 7D micro-ripstop nylon
Lining Material: 7D micro-ripstop nylon
Baffle Construction: 3-dimensional, continuous horizontal
Loft Height: 2.75 inches
Available Sizes: Short, Regular, Long
Features: Draft tubes at zipper, neck, and hood; parka-style hood with cinch cords; chest pocket

What's included

20-Degree Mummy Bag
Stuff sack

If you're giving it

You'll need their size

Size selection requires knowing the recipient's height for proper fit.

The details

This mummy-style sleeping bag uses premium 1000 fill power grey goose down treated with a water-repellent finish to deliver warmth without the weight penalty of heavier bags. Three-dimensional baffles let the insulation fully expand to 2.75 inches, creating an efficient layer of trapped air around you. Horizontal baffling runs the length of the bag so you can redistribute fill as temperatures shift through the night.

The shell and lining are built from 7-denier micro-ripstop nylon, chosen for its combination of tear resistance, breathability, and compressibility. Draft tubes line the zipper, neck, and hood to block cold air from slipping inside. A parka-style hood with cinch cords conforms to your head, and additional drawcords at the neck help seal the opening when you hunker down.

A small chest pocket holds a headlamp or other small items you want within arm's reach. The entire bag compresses into a compact bundle that fits easily into a backpack. Available in short, regular, and long sizes to match your height and preferred fit.

Hyperlite Mountain Gear

20-Degree Mummy Bag

Ultralight down sleeping bag designed for cold-weather backpacking

$650at hyperlitemountaingear.com

Choose an option

Quantity

Buy from Hyperlite Mountain Gear

Ships and sold by Hyperlite Mountain Gear. About this merchant

The 3-second version

1000 fill power goose down with water-repellent treatment
3D baffles expand to 2.75 inches for efficient heat retention
Ultralight 7-denier ripstop shell compresses small
Down loses insulation when wet
Delicate 7D fabric needs gentle handling
Mummy cut may feel snug for restless sleepers

Cheaper alternatives

Questions

What temperature range is this sleeping bag designed for?: This bag carries a 20-degree Fahrenheit comfort rating, making it suitable for three-season backpacking and cool-weather camping. Your personal warmth will vary depending on factors like what you wear to bed, the insulation under you, and whether you sleep warm or cold naturally.
How does 1000 fill power compare to lower fill ratings?: Fill power measures how much space one ounce of down occupies when fully expanded. Higher fill power means more loft and warmth per ounce, so 1000 fill power down provides the same insulation as lower grades while weighing less and compressing smaller. It's the lightest option for serious backpackers.
Can I adjust the insulation distribution inside the bag?: Yes. The continuous horizontal baffles allow you to shift down toward your feet or redistribute it evenly along the length of the bag. This lets you adapt to changing temperatures or personal preference without adding or removing layers.
How should I care for a down sleeping bag?: Store it uncompressed in a large breathable sack to maintain loft. When washing is needed, use a front-loading machine with down-specific detergent and tumble dry on low heat with clean tennis balls to break up clumps. Avoid long-term storage in the compression sack.
What's the difference between the size options?: Short, regular, and long sizes correspond to different body heights and provide appropriate bag length. A properly sized mummy bag should extend a few inches past your head and feet without leaving excessive empty space, which you'd have to heat unnecessarily.