Andes Infinium 800 Down Sleeping Bag

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UOG TOP PICK—Rab’s Andes Infinium bags are their Expedition class bags, filled with premium 800 Fill Power down contained within trapezoidal boxwall baffles with a differential cut to eliminate cold spots. The use of the impressive TILT technology makes this one of our top picks for cold-weather treks

Rab says:

Combining 800FP goose down with heat reflective TILT technology and a GORE-TEX INFINIUM™ WINDSTOPPER® outer, the Andes Infinium offers an exceptional warmth to weight ratio ideal for expeditions in freezing conditions. Offering refuge to those exploring the world’s highest peaks and the polar regions, the Andes Infinium is packed with cutting edge tech, built to keep you warm.

The Andes Infinium 800 is filled with 800g of ultra-high lofting 800FP, goose down. It is constructed using trapezoid shaped boxwall baffles, which stack together reducing cold spots and maximise the lofting and efficiency of the down inside. Reflecting heat towards the body, our TILT technology is seen as a silver sheen on this inside of the bag. Reducing heat loss by up to 32%, TILT substantially improves thermal insulation without compromising pack size, breathability, or weight.

It has a mummy fit and offers a similar level of warmth to our Expedition range of sleeping bags, but in a lower bulk package. The GORE-TEX INFINIUM™ WINDSTOPPER® outer provides a robust, windproof shield against icy chills, and the face baffle and 3D neck collar cinch in snug around the face to seal in the heat. The ¾ length YKK® zip has its own internal baffle to avoid heat escaping and an angled foot box allows for a comfortable sleeping position.

Hand-filled in the UK, all our down bags benefit from never having had their down compressed before use, maintaining the down’s loft and warmth.

Our Verdict

Rab’s Andes Infinium 800 Down Sleeping Bag fits in the Andes series which are Expedition class sleeping bags filled with premium 800 Fill Power down contained in a trapezoidal boxwall baffle construction with a differential cut to eliminate cold spots.

The Andes bags also use TILT technology which inserts a breathable but reflective layer inside the bag to reflect heat to the inside thus boosting the bags performance. The shell fabric is windproof Gore Infinium further improving its ability to keep you warm.

Built with a Mummy shape these are designed to be efficient but still retain space for additional clothing or equipment to come inside the bag with you. Although some people may not like a close fitting bag they are more efficient, reducing heat loss due to air movement inside the bag and on expedition you may be glad of that.

The rest of the bag is up to Rab’s high standard with features and construction to a very high standard.

– Reviewed by Ultralight Outdoor Gear

Features

• GORE-TEX INFINIUM™ WINDSTOPPER®outer provides weather protection and high breathability 
• TILT lining helps to reflect and reduce heat loss
• Trapezoidal boxwall construction with differential cut, to maximise loft and warmth 
• Longitudinal chest and foot baffles with internal Flowgate technology to control down movement 
• Face baffle and 3-dimensional neck collar to seal in warmth 
• GORE-TEX INFINIUM™ lining in face and foot area for additional water resistance 
• YKK 3/4 length main zip with down filled baffle to trap warmth 
• YKK zipped internal stash pocket 
• Angled foot box for relaxed sleeping posture
• Zipped cotton sack with water-resistant base for home storage
• Roll-top waterproof stuffsack included 
• Outer: 100% polyamide with ePTFE membrane. Lining: 100% polyamide with Titanium. 
• Mummy shape

Specifications

Temperature Rating (EN(13537:2012)

• Comfort: -11°C / 12°F
• Comfort Limit: -19°C / -2°F
• Extreme: -41°C / -42°F
• Rab Sleep Limit: -23°C / -10°F

Regular Specs

• Weight: 1350g (excludes storage bags)
• Fill weight: 800g
• Packed size: 45 x 28cm
• Overall length: 225cm
• Height of user: 195cm
• Internal shoulder girth: 160cm
• Internal hip girth: 136cm
• Internal foot girth: 108cm

Material & Construction

• 13D GORE-TEX INFINIUM™ with WINDSTOPPER® product technology (45gsm) DWR
• Lining: 20D nylon ripstop with TILT technology (35gsm)
• Fill: 800FP R.D.S Certified European Goose Down with Nikwax fluorocarbon-free Hydrophobic Finish
• GORE-TEX INFINIUM™ WINDSTOPPER®outer provides weather protection and high breathability

Help & advice:

• The Ultimate Guide to Lightweight Sleeping Bags
• Time-Saver Guide to Choosing a Sleeping Bag
• About Rab
• Rab Down Sleeping Bag Range Explained
• The EN13537 Standard
• All About Down
• Hydrophobic Down
• Responsible Down Standard
• Recycled Content in Outdoor Gear
• Rab Sustainability and Responsibility