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Sizing charts

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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.



Features & Components


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 L

Packing volume

5 [L] Size L


GELANOTS Ultra Light Rip Stop Shell


730 [G] Size L

Size recommendation:

M / Short: up to 165cm 

L / Regular: up to 180cm 

XL / 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.

Product RADICAL 4Z was added to basket

What's next?

Since - 1983

Size Chart

Dimensions/SizesM / ShortL / RegularXL / Long
AWaga całkowita / Total weight [g]685720790
BWaga wypełnienia / Fill weight [g]450470510
CObjętość po spakowaniu / Compressed volume [l]55,35,5
DDługość wewnętrzna / Inner length [cm]177192222
EDługość zewnętrzna / Outer length [cm]185200230
FSzerokość przy ramionach / Shoulder width [cm]848484
GSzerokość przy stopach / Foot Width [cm]505050