Western Mountaineering Apache MF Sleeping Bag - -9°C Down Bag (Lightweight 2-3 Season, 850+ Fill)

Lightweight Versatility. Cold-Weather Confidence.

The Western Mountaineering Apache MF is a high-performance 2-3 season sleeping bag that pushes into colder conditions without adding unnecessary weight.

With 6" (15cm) of loft and 850+ fill power goose down, it delivers reliable warmth down to -9°C, making it ideal for shoulder-season trips, alpine bivouacs, and unpredictable weather.

Its efficient mummy cut keeps weight low while heating quickly, while features like a full down collar and continuous baffles ensure you stay warm when temperatures drop.

Why You'll Love It

Lightweight - Around 900g total weight
Warm to -9°C - Extends into colder conditions
850+ fill power down - Premium insulation
Compact pack size - Easy to carry
Versatile - True 2-3 season performance

Built for Versatile Cold-Weather Use

Perfect for:

Spring & autumn climbing
Alpine bivouacs
Lightweight backpacking
Cool summer nights at altitude
Fast & light missions

Designed for climbers who want one bag that covers multiple seasons

Performance Features

Extended 2-3 Season Warmth (-9°C)

Reliable performance in cooler conditions

Keeps you:

Warm during shoulder seasons
Prepared for temperature drops
Comfortable across varied climates

850+ Fill Power Goose Down

Premium insulation

Provides:

Excellent warmth-to-weight ratio
Long-lasting loft
High compressibility

Continuous Baffle Construction

Adjustable insulation system

Allows:

Shifting down for colder nights
Balanced insulation in milder weather
Greater versatility

Full Down-Filled Draft Collar

Seals in warmth

Helps:

Reduce heat loss
Improve thermal efficiency
Add comfort in colder temps

MicroLite XP™ Shell

20D breathable, water-resistant fabric

Benefits:

Weather resistance
Breathability
Durability in mixed conditions

Efficient Mummy Cut

Performance-focused shape

Provides:

Faster heat retention
Lower weight
Reduced bulk

Technical Specifications

Temperature Rating: -9°C
Fill: 850+ Fill Power Goose Down
Loft: 15 cm (6")
Shell Fabric: 20D MicroLite XP™

Weights:
165cm: 850g
180cm: 905g
200cm: 965g

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

Girth (Shoulder/Hip/Foot):
165cm: 150 / 130 / 97 cm
180cm: 150 / 130 / 97 cm
200cm: 152 / 130 / 97 cm

Packed Size:
All sizes: 20 x 38 cm

Origin: USA

Includes:
Ultralight stuff sack
Breathable mesh storage bag

Perfect For

Alpine climbers
Backpackers
Fast & light adventurers
Shoulder-season use
Multi-day trips