Rab Solar Ultra 1 Sleeping Bag (-4°C)

Crafted with cutting-edge technology and environmentally conscious materials, the Solar Ultra sleeping bag reflects a commitment to creating high-performance gear with a lighter footprint. Lightweight, fast-drying and durable, the Solar Ultra 1 is enhanced by heat-reflective TILT technology to deliver impressive warmth for its weight. Its narrow, tapered mummy silhouette further trims bulk and saves weight, making it a dependable companion for swift, minimalist adventures in cooler climates.

Constructed with a triple-layer structure of 100% recycled Stratus™ Eco insulation arranged in a concertina formation, the Solar Ultra replicates the warmth and feel of down in a featherless, lightweight form. TILT technology, integrated into the upper layer, reflects body heat back to the user, reducing radiant heat loss by up to 15% without compromising breathability, packability or overall weight. Internally, elasticated quilting pulls the insulation closer to the body, helping to eliminate cold pockets. Localised offset stitching secures the insulation while reducing the chance of cold spots caused by traditional quilting.

A ¾ length YKK main zip is lined with a baffle to prevent heat escaping, while the adjustable neck baffle offers a snug seal for further warmth. With a tough yet lightweight 20D recycled polyester Atmos™ outer, the Solar Ultra stands as a top-tier synthetic sleeping bag, ideal for alpine pursuits, bikepacking, or fast-paced backpacking routes.

Features

• The outer shell is made from 20D Atmos™ recycled nylon ripstop (38gsm) with a fluorocarbon-free DWR treatment.
• The lining features 20D Atmos™ recycled polyester ripstop (41gsm) with a fluorocarbon-free DWR finish.
• The scrim layer consists of 100% polyester with an aluminium coating (15gsm) to enhance thermal efficiency.
• The upper section contains a triple-layer construction of Recycled Stratus™ Synthetic Sheet Insulation (100% recycled polyester in 100gsm/100gsm/40gsm layers).
• The base uses a dual-layer blanket configuration of Recycled Stratus™ Synthetic Sheet Insulation (100% recycled polyester in 40gsm/40gsm layers).
• Internal TILT scrim technology on the upper portion helps reduce radiant heat loss for added thermal performance.
• The triple-layer concertina blanket construction on the upper increases loft and overall warmth.
• Elasticated internal quilting draws the insulation towards the sleeper, minimising cold air gaps.
• Offset localised quilting reduces cold transmission by minimising stitch-through points.
• A low-volume hood design enhances heat retention around the head.
• The adjustable close-fitting neck baffle reduces heat loss and creates a sealed, cosy fit.
• The YKK ¾ length main zip features a synthetic insulated zip baffle to trap warmth inside.
• A YKK anti-snag zip insert and internal anti-snag guard ensure smooth operation.
• A compression stuff sack is included for efficient packing and transport.
• Both the outer and lining fabrics are composed entirely of recycled polyester.
• The bag is shaped in a tapered mummy style for maximum thermal efficiency and reduced bulk.
  
  

Sustainability Features

• Fluorocarbon (PFAS) free fabric
• Fluorocarbon (PFAS) free product
• Greater than 75% recycled materials
• Made with renewable energy
  
  

Specifications

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.

Stratus™

Designed to deliver exceptional performance in icy temperatures and wet conditions, Stratus™ is a highly efficient synthetic insulation that provides warmth, durability, and rapid drying capabilities. Lightweight yet effective, it is an ideal choice for tackling the demands of a mountain ascent.

Atmos™

Designed for mountain adventures, Atmos™ offers exceptional weather protection while remaining packable and quick-drying. Crafted with ultra-fine yarns in a tightly woven construction, it delivers impressive durability, high water resistance, and reliable windproof performance.

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