Radical 4Z


4Z is an all season sleeping bag. This particular model features completly redesigned 3D down filled zipper and collar buffles which significantly increased it’s temperature range up to -25 [C]. Experienced users can also use it during winter hikes/expeditions to save some packing space.


3D zipper and collar buffles

Internal/external hang loops

Inside pocket

Non blocking zipper

Single hand hood regulation

Compression/storage sack included

Velcro lock protection


YKK / ITW Nexus

Technical data

Temperature range

-1/-7/-25 [C] EN13537


900 FP Polish White Goose Down

Fill weight

470 [G] Size Regular

Packing volume

5 [L] Size Regular


GELANOTS Ultra Light Rip Stop Shell


720 [G] Size Regular

Size recommendation for height:

Short: up to 165cm 
Regular: up to 180cm 
Long: up to 205cm 

Design & Construction

Construction Z

Very light and warm construction used in RADICAL Z sleeping bags. The baffle between chambers is angled which makes it warmer then the popular H construction. Best for all-season sleeping bags.

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