Maximum 3-Season Protection. No Compromises.

The Western Mountaineering Antelope MF is a premium 3-season sleeping bag built for climbers and adventurers who want maximum warmth, reliability, and comfort across a wide range of conditions.

With 7" (18cm) of loft and filled with 850+ fill power goose down, it delivers dependable warmth down to -15°C, making it ideal for early spring through late autumn-and into colder alpine conditions.

A roomy cut, combined with continuous baffles and a full down collar, ensures both comfort and thermal efficiency, making this one of the most substantial and versatile 3-season bags available.

Why You'll Love It

True 3-season performance - Handles colder conditions with ease
Warm to -15°C - Ideal for alpine and shoulder seasons
850+ fill power down - Premium insulation
Spacious fit - Comfortable and practical
Highly versatile - One bag for multiple conditions

Built for Extended 3-Season Use

Perfect for:

Spring to autumn climbing
Alpine bivouacs
Cold-weather backpacking
High-altitude trekking
Shoulder-season camping

Designed to handle changing conditions with confidence

Performance Features

Cold-Ready 3-Season Warmth (-15°C)

Extended temperature range

Keeps you:

Warm in shoulder seasons
Protected during cold nights
Comfortable in alpine environments

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
Balancing warmth across conditions
Increased versatility

Full Down-Filled Draft Collar + Tube

Enhanced heat retention

Helps:

Seal in warmth
Block cold air entry
Maintain thermal efficiency

MicroLite XP™ Shell

20D breathable, water-resistant fabric

Benefits:

Weather resistance
Breathability
Durability in varied environments

Roomy Mummy Fit

Comfort-focused design

Provides:

More space than typical mummy bags
Comfort for extended use
Room for light layering

Technical Specifications

Temperature Rating: -15°C
Fill: 850+ Fill Power Goose Down
Loft: 18 cm (7")
Shell Fabric: 20D MicroLite XP™

Weights:
165cm: 1050g
180cm: 1105g
200cm: 1160g

Fill Weights:
165cm: 680g
180cm: 735g
200cm: 795g

Girth (Shoulder/Hip/Foot):
165cm: 157 / 135 / 99 cm
180cm: 157 / 135 / 99 cm
200cm: 160 / 137 / 99 cm

Packed Size:
All sizes: 20 x 43 cm

Origin: USA

Includes:
Ultralight stuff sack
Breathable mesh storage bag

Perfect For

Alpine climbers
Backpackers
3-season adventurers
Cold-weather campers
High-altitude trekking