Sleeping Bags

Warmth and comfort for restful nights outdoors, from summer camping to winter expeditions.

2+ sleeping bags tested in real conditions

Top-Rated Sleep Systems

The highest-rated sleeping bags in our testing, proven in conditions from desert heat to alpine cold

Western Mountaineering UltraLite

Western Mountaineering

UltraLite
(4.8)
Nemo Disco 15

Nemo

Disco 15
(4.6)

Temperature Ratings

Understanding sleeping bag temperature ratings for the right warmth

☀️

Summer Bags

35°F+

Lightweight bags for warm weather camping and backpacking.

Maximum ventilation
Minimal insulation
Lightest weight
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🍂

3-Season Bags

20°F to 35°F

Versatile bags for spring, summer, and fall conditions.

Balanced warmth/weight
Most versatile
Good for most trips
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❄️

Winter Bags

0°F to 20°F

Cold weather bags for winter camping and mountaineering.

Maximum insulation
Draft protection
Durable construction
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🏔️

Expedition Bags

Below 0°F

Extreme cold bags for alpine and polar expeditions.

Extreme warmth
Expedition features
Professional grade
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Insulation Types

Understanding down vs synthetic fill for your needs

🪶

Down Fill

Goose or duck down provides the highest warmth-to-weight ratio and excellent compressibility.

Advantages:

• Lightest weight for warmth

• Most compressible

• Long-lasting with care

• Superior loft and comfort

Disadvantages:

• Loses warmth when wet

• Slow to dry

• More expensive

• Requires careful care

Fill Power Guide

550-650: Budget down, heavier

700-750: Good performance/price

800-850: Premium, ultralight

900+: Highest performance

🧬

Synthetic Fill

Polyester insulation that maintains warmth when wet and dries quickly.

Advantages:

• Retains warmth when wet

• Quick drying

• Lower cost

• Easy maintenance

Disadvantages:

• Heavier for same warmth

• Less compressible

• Shorter lifespan

• Less comfortable

Best For

• Wet/humid conditions

• Budget-conscious buyers

• Low-maintenance preference

• Frequent washing needs

Key Features

Design elements that affect comfort, warmth, and performance

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Shape

Mummy: Most efficient, least space
Semi-rectangular: Balance of warmth/space
Rectangular: Most roomy, less efficient
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Hood

Contoured: Follows head shape
Adjustable: Cinch cords for fit
Pillow pocket: Built-in pillow space
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Draft Protection

Draft collar: Around neck/shoulders
Draft tube: Behind zipper
Footbox: Extra insulation at feet
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Sizing

Regular: Up to 6'0"
Long: 6'0" to 6'6"
Wide: Extra shoulder/hip room
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Zippers

Full-length: Maximum ventilation
3/4 length: Weight savings
Two-way: Foot venting option
💼

Storage

Stuff sack: Compact packing
Storage sack: Long-term storage
Compression: Reduces pack size

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