Radical 4Z Down Sleeping Bag Down Sleeping Bags

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UOG TOP PICK—The Pajak Radical 4Z is an exceptional all-season sleeping bag for outdoor enthusiasts. It is filled with 900FP Polish white goose down and offers outstanding insulation and warmth in various weather conditions.

Pajak says: 

The Radical 4Z sleeping bag is an all-season sleeping bag that is perfect for anyone who loves the great outdoors. It features 3D down-filled zipper and collar baffles which significantly increase its temperature range, making it suitable for use in a variety of weather conditions. The hood and feet areas are protected with waterproof coated inserts, which help to keep moisture out and keep you warm and dry. The T-bar style zipper puller on the main zip is easy to find and prevents snagging, making it easy to get in and out of the sleeping bag. Experienced users can also use it during winter hikes to save some packing space. With a comfort temperature of -7 degrees Celsius, this sleeping bag is perfect for cold weather camping and hiking. It is filled with 900FP RDS-certified polish white goose down, which provides excellent insulation and warmth. Overall, the Radical 4Z sleeping bag is a high-quality, versatile option for anyone looking for a reliable all-season sleeping bag.

Our Verdict

The Pajak Radical 4Z Down Sleeping Bag is an exceptional all-season sleeping bag designed for outdoor enthusiasts who demand versatility and high performance. This sleeping bag stands out due to its excellent thermal efficiency and lightweight design, making it a reliable choice for various weather conditions, including cold winter nights.

The Radical 4Z is filled with 900FP RDS-certified Polish white goose down, which offers outstanding insulation and warmth. This high fill power ensures that users stay comfortable even in freezing temperatures. The EN comfort rating is -1°C, and the comfort limit is -7°C, making it suitable for cold weather camping and hiking. 

One of the standout features of the Radical 4Z is its 3D down-filled zipper and collar baffles. These baffles significantly enhance the sleeping bag’s temperature range by preventing cold spots and maintaining consistent insulation. The hood and foot areas are equipped with waterproof coated inserts, which protect against moisture and help keep you dry and warm in damp conditions.

Weighing just 761g for the regular size and 800g for the long size, the Radical 4Z is impressively lightweight. This makes it ideal for backpackers and hikers who need to minimise their pack weight. The use of GELANOTS® Ultra Light Rip Stop Shell fabric contributes to its durability and weather resistance, ensuring long-lasting performance.

– Reviewed by Ultralight Outdoor Gear

Features

• An all season sleeping bag. Experienced users can also use it during winter hikes / expeditions to save packing space. 
• It is made in Poland from carefully selected, high-quality materials and is filled with RDS certified 900FP Polish White Goose Down. Overall, the Radical 4Z is a reliable and essential piece of equipment for any winter Himalayan expedition.
• This sleeping bag is designed to withstand extreme temperatures down to -25°C (ISO 23537) and has a weight of 1500g, making it the warmest sleeping bag in its weight category.
• Radical 4Z sleeping bag is a high-quality piece of equipment designed for use on winter Himalayan expeditions. Its innovative construction features H-shaped chambers that are stacked on two slightly shifted levels, which completely eliminates cold drafts.
• Non blocking zipper
• Internal/external hang loops
• Inside pocket

Specifications

Temperature Rating

• EN13537:2012 Comfort: -1°C
• EN13537:2012 Comfort Limit: -7°C
• EN13537:2012 Extreme Limit: -25°C

Regular Specs

• Weight: 761g (excluding bag)
• Fits up to: 180cm
• Inner length: 192cm
• Outer length: 200cm
• Shoulder width: 82cm
• Foot width: 50cm
• Packing volume: 5 Litres

Long Specs

• Weight: 800g (excluding bag)
• Fits up to: 205cm
• Inner length: 222cm
• Outer length: 230cm
• Shoulder width: 82cm
• Foot width: 50cm
• Packing volume: 5 Litres

Material & Construction

• Fabric: GELANOTS® Ultra Light Rip Stop Shell
• FILL: 900 FP RDS Polish White Goose Down
• Fill Weight: 470g (Regular)