Crafted to serve as sanctuary in some of the planet’s harshest environments – from soaring Himalayan summits to the frozen extremes of the poles – the Andes Infinium is a masterclass in thermal performance, combining advanced insulation technology with thoughtful design to keep adventurers warm, even when the mercury plummets.

The Andes Infinium 800 is generously filled with 800 grams of ultra-lofting, 800FP European goose down. Its trapezoid boxwall baffle construction allows each section to stack seamlessly, minimising cold spots and maximising loft and thermal efficiency. Lined with cutting-edge TILT technology – visible as a silver inner layer – the bag reflects radiant heat back towards the sleeper. This innovation can reduce heat loss by up to 32%, offering a substantial boost in insulation without compromising on breathability, packability, or weight.

Engineered in a mummy shape for optimal warmth retention, it mirrors the performance of the Expedition series, yet with a more compact profile. The women’s version features a slightly shorter length, a narrower fit at the shoulders, and a marginally wider cut at the hips to deliver improved comfort and thermal efficiency.

For dependable defence against frigid winds, the outer shell is constructed from GORE-TEX INFINIUM™ WINDSTOPPER® fabric, providing a durable and windproof barrier. A 3D neck collar and face baffle draw snug around the head to trap warmth inside, while the ¾-length YKK® zip includes its own internal baffle to prevent cold draughts. The angled foot box promotes a relaxed, natural sleeping position.

Each bag is hand-filled in the UK, ensuring that the down remains uncompressed prior to use, preserving its full loft and insulating performance.

Features

• The outer shell is made from 13D GORE-TEX INFINIUM™ with WINDSTOPPER® technology (45 gsm) and treated with a durable water repellent finish.
• The lining is crafted from 20D nylon ripstop featuring TILT technology (35 gsm) to enhance thermal efficiency.
• The fill comprises 800FP European goose down with a Nikwax fluorocarbon-free hydrophobic treatment (800 g / 28.2 oz).
• GORE-TEX INFINIUM™ WINDSTOPPER® outer fabric offers excellent weather protection and breathability.
• TILT lining reflects body heat and minimises heat loss without increasing weight.
• Trapezoidal boxwall baffles with a differential cut optimise loft and retain warmth across the bag.
• Longitudinal baffles across the chest and feet include internal Flowgate technology to control down distribution.
• A face baffle and three-dimensional neck collar help seal in warmth around the head and shoulders.
• GORE-TEX INFINIUM™ fabric is placed in the face and foot areas for added water resistance.
• The YKK ¾ length zip includes a down-filled internal baffle to trap warmth.
• An internal YKK zipped stash pocket offers secure storage for essentials.
• The angled foot box supports a comfortable and natural sleeping posture.
• A zipped cotton storage sack with a water-resistant base is included for long-term home storage.
• A roll-top waterproof stuff sack is provided for reliable protection on the move.
• The outer is made from 100% polyamide with an ePTFE membrane; the lining is 100% polyamide with a titanium layer.
• The sleeping bag has a mummy-shaped silhouette to enhance thermal efficiency.
  
  

Sustainability Features

• Made with renewable energy
  
  

Specifications

Size Guide

Technology

TILT (Thermo Ionic Lining Technology)

This innovative heat-retention technology functions similarly to an emergency blanket, reflecting body heat back towards the wearer while still allowing breathability and comfort. By enhancing thermal efficiency, it provides essential warmth when temperatures drop significantly.

GORE-TEX INFINIUM™ WINDSTOPPER®

This fabric technology is entirely windproof and exceptionally breathable, making it an ideal choice for high-intensity pursuits in the mountains where staying dry from sweat matters more than staying dry from rain. Designed for versatility and performance, it balances moisture management and comfort to support fluid movement during active adventures.

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