First Ascent

Ice Breaker Down Sleeping Bag Large

Name: Ice Breaker Down Sleeping Bag Large
Brand: First Ascent

EU unverified

ISO 23537 comfort of -3°C on a 1.72kg build: 650-fill 92/8 down, scalloped neck baffle and a foot-friendly zip. Roomier cut than ultralight rivals, built for multi-day cold camps.

$336 typical

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EDITION 01RESEARCHED 2026-08-142 SOURCESREFRESH DUE 2027-02

SUBSTANCE SCORES

substance7.8/ 10

design7.5/ 10

value7.0/ 10

WHY THE PRICE IS JUSTIFIED

The price buys an ISO 23537-tested cold-weather bag, 650-FP 92/8 down, a 1.72 kg build, and unusually complete anti-draft anatomy rather than an ultralight badge.

MATERIALS

Insulation650 FP 92/8 goose down

Enough loft and fill quality for a measured -3°C comfort rating without an ultra-premium price.

ShellMicrotex R/S

More robust than ultralight fabrics for multi-day use.

LinerMicrotex 5000

Designed as a soft interior fabric.

CRITERIA

9/10

Thermal Truth

ISO 23537-tested; comfort -3°C.

7/10

Insulation Efficiency

650-FP 92/8 goose down; weight is 1.72 kg.

9/10

Fit And Drafts

Cowl top, scalloped neck and face baffle.

7/10

Moisture Resilience

Down requires normal dry-bag discipline.

7/10

Weight And Packability

22 x 38 cm packed; not an ultralight bag.

8/10

Construction Durability

Microtex R/S outer.

8/10

Usability And Repair

Foot-friendly zip and internal pocket.

IDEAL FOR

·Drakensberg winter trips
·Kilimanjaro approaches
·cold multi-day hiking

NOT FOR

·fastpacking
·persistently wet unprotected camps

DESIGN & ERGONOMICS

Contoured cowl, scalloped quick-draw neck, face baffle and foot-friendly zip are unusually purposeful comfort details; an internal pocket improves nighttime usability.

LONGEVITY

The ripstop-oriented outer and moderate-fill down favor long service if stored uncompressed and washed with down-specific cleaner. No verified factory repair policy was found.