Western Mountaineering HighLite Sleeping Bag - Ultralight Down Bag (2°C, 850+ Fill Power)

The Lightest Way to Sleep Warm

The Western Mountaineering HighLite is an ultralight sleeping bag built for climbers and adventurers who demand maximum weight savings without sacrificing essential warmth.

At just ~455g total weight, it's one of the lightest high-performance sleeping bags available-using 850+ fill power goose down and a highly efficient design to deliver warmth down to 2°C.

With its minimalist construction, half-length zip, and optimised mummy shape, the HighLite is perfect for fast and light missions where every gram counts.

Why You'll Love It

Ultra-lightweight - From ~425g
Highly compressible - Packs extremely small
850+ fill power down - Premium insulation
Minimalist design - Only essential features
Fast heating - Efficient mummy cut

Built for Fast & Light Adventures

Perfect for:

Fastpacking
Thru-hiking
Bikepacking
Summer alpine use
Minimalist camping

Designed for when weight and pack size are critical

Performance Features

Extreme Ultralight Design

Minimalist construction

Provides:

Maximum weight savings
Reduced bulk
High packability

Summer Warmth (2°C)

Lightweight insulation

Ideal for:

Warm conditions
Summer nights
Layered systems

Hybrid Construction Design

Sewn-through + vertical baffling

Improves:

Loft efficiency
Down distribution
Packability

Half-Length #4 YKK Zipper

Weight-saving feature

Allows:

Basic ventilation
Reduced overall weight
Simple, efficient use

ExtremeLite™ Shell (12D)

Ultra-light, high-thread-count fabric

Benefits:

Durability for its weight
Breathability
Compact packing

Efficient Mummy Cut

Performance-focused shape

Provides:

Faster heat retention
Lower internal volume
Minimal excess weight

Technical Specifications

Temperature Rating: 2°C
Fill: 850+ Fill Power Goose Down
Loft: 9 cm (3.5")
Shell Fabric: 12D ripstop nylon (ExtremeLite™)

Weights:
165cm: 425g
180cm: 455g
200cm: 480g

Fill Weights:
165cm: 200g
180cm: 225g
200cm: 255g

Girth (Shoulder/Hip/Foot):
165cm: 150 / 130 / 97 cm
180cm: 150 / 130 / 97 cm
200cm: 152 / 132 / 97 cm

Packed Size:
165cm: 15 x 25 cm
180cm: 15 x 30 cm
200cm: 15 x 30 cm

Origin: USA

Includes:
Ultralight stuff sack
Breathable mesh storage bag

Perfect For

Ultralight backpackers
Fastpackers
Bikepackers
Summer climbers
Minimalist adventurers