All the Performance of the UltraLite-With More Room to Move

The Western Mountaineering AlpinLite takes everything that makes the UltraLite a benchmark 3-season sleeping bag and adds a wider, more spacious cut for enhanced comfort.

With 5.5" (14cm) of loft and 850+ fill power goose down, it delivers dependable warmth down to -7°C, making it ideal for backpacking, alpine trips, and long-distance adventures.

Designed for those who want lightweight efficiency without the restrictive feel of a narrow mummy bag, the AlpinLite is the perfect balance of space, warmth, and packability.

Why You'll Love It

Wider fit - More room for comfort
3-season warmth - Rated to -7°C
850+ fill power down - Premium insulation
Lightweight - From ~880g
Proven design - Based on UltraLite performance

Built for Comfortable Backcountry Travel

Perfect for:

Backpacking
Thru-hiking
Alpine climbing
3-season camping
Long-distance trekking

Designed for those who want comfort without sacrificing performance

Performance Features

3-Season Warmth (-7°C)

Reliable all-round performance

Keeps you:

Warm across spring, summer, and autumn
Prepared for cooler nights
Comfortable in varied conditions

850+ Fill Power Goose Down

Premium insulation

Provides:

Exceptional warmth-to-weight
High compressibility
Long-lasting loft

Continuous Baffle System

Adaptive insulation control

Allows:

Shifting down for colder nights
Balancing warmth in milder conditions
Greater versatility

Insulated Draft Tube + Collar

Heat retention system

Helps:

Block cold air
Seal in warmth
Improve efficiency

ExtremeLite™ Shell (12D)

Ultralight and breathable

Benefits:

Low weight
Compact packing
Durability for its class

Wide Mummy Fit

Comfort-enhanced design

Provides:

More shoulder and hip room
Greater sleeping comfort
Space for light layering

Technical Specifications

Temperature Rating: -7°C
Fill: 850+ Fill Power Goose Down
Loft: 14 cm (5.5")
Shell Fabric: 12D ripstop nylon (ExtremeLite™)

Weights:
165cm: 820g
180cm: 880g
200cm: 935g
215cm: 995g

Fill Weights:
165cm: 480g
180cm: 540g
200cm: 595g
215cm: 650g

Girth (Shoulder/Hip/Foot):
165cm: 160 / 142 / 99 cm
180cm: 163 / 140 / 99 cm
200cm: 165 / 142 / 99 cm
215cm: 165 / 142 / 99 cm

Packed Size:
165cm: 18 x 33 cm
180cm+: 20 x 38 cm

Origin: USA

Includes:
Ultralight stuff sack
Breathable mesh storage bag

Perfect For

Backpackers
Thru-hikers
Alpine climbers
Comfort-focused adventurers
3-season users