Western Mountaineering Lynx MF Sleeping Bag - -23°C Expedition Down Bag (850+ Fill Power)

Serious Warmth. Lightweight Efficiency.

The Western Mountaineering Lynx MF is a high-performance cold-weather sleeping bag designed for climbers and adventurers who need serious insulation without excessive weight.

With an impressive 8.5" (22cm) of loft and filled with 850+ fill power goose down, the Lynx delivers reliable warmth down to -23°C, making it ideal for winter mountaineering, ski touring, and cold alpine nights.

Combining advanced construction like V-Block side baffles, a full draft collar, and insulated draft tubes, it ensures consistent warmth and excellent down control-making it one of the warmest bags in its weight class.

Why You'll Love It

Extreme warmth - Rated to -23°C
Lightweight for its class - Around 1.4kg
850+ fill power down - Premium insulation
High loft design - 8.5" of warmth
Expedition-ready - Built for cold environments

Built for Cold Weather & Alpine Use

Perfect for:

Winter mountaineering
Ski touring
Alpine climbing
Cold-weather camping
High-altitude use

Designed for serious cold without unnecessary bulk

Performance Features

Cold Weather Protection (-23°C)

Reliable sub-zero insulation

Keeps you:

Warm in harsh conditions
Protected on winter trips
Comfortable overnight

850+ Fill Power Goose Down

Premium insulation

Provides:

Exceptional warmth-to-weight
High loft retention
Long-lasting performance

V-Block Side Baffle Construction

Advanced down distribution

Improves:

Heat retention
Even insulation
Cold spot elimination

Insulated Draft Tube + Collar

Heat retention system

Helps:

Block cold air
Seal in warmth
Improve thermal efficiency

MicroLite XP™ Shell

20D breathable, water-resistant fabric

Benefits:

Weather resistance
Breathability
Durability in harsh conditions

Efficient Mummy Fit

Performance-focused design

Allows:

Heat retention
Lightweight efficiency
Comfort with minimal bulk

Technical Specifications

Temperature Rating: -23°C
Fill: 850+ Fill Power Goose Down
Loft: 22 cm (8.5")
Shell Fabric: 20D MicroLite XP™

Weights:
165cm: 1360g
180cm: 1415g
200cm: 1500g

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

Girth (Shoulder/Hip/Foot):
165cm: 155 / 137 / 99 cm
180cm: 157 / 137 / 99 cm
200cm: 160 / 140 / 99 cm

Packed Size:
All sizes: 23 x 46 cm

Origin: USA

Includes:
Ultralight stuff sack
Breathable mesh storage bag

Perfect For

Winter climbers
Ski tourers
Alpine adventurers
Cold-weather campers
High-altitude expeditions