Serious Warmth for Cold-Weather Adventures

The Robens Spire III -9°C Sleeping Bag is the warmest model in the Spire range, designed for demanding cold-weather camping, mountain adventures, and shoulder-season expeditions. Combining a thermally efficient body-contoured profile with OneThermo® synthetic insulation, the Spire III delivers impressive warmth while remaining practical and reliable in damp conditions.

A 3D hood, redesigned neck baffle, insulated zip baffle, and insulated shark fin foot box work together to trap heat and minimise cold spots, helping you stay comfortable when temperatures drop well below freezing.

Why You'll Love It

Maximum Warmth in the Spire Range
→ Comfort rated to -3°C and limit rated to -9°C

Cold-Weather Ready
→ Ideal for late autumn, winter, and mountain conditions

Performs When Damp
→ Synthetic insulation retains warmth in condensation and humid environments

Heat-Retaining Design
→ Body-contoured shape minimises dead air space

Built for Adventure
→ Durable materials and practical features throughout

OneThermo® Synthetic Insulation

The Spire III features OneThermo® insulation, offering:

• Excellent thermal performance
• Reliable warmth in damp conditions
• Fast drying characteristics
• Long-lasting loft retention
• Durability for frequent outdoor use

Perfect for UK winter camping and colder mountain environments where moisture resistance is essential.

Temperature Ratings

Comfort: -3°C
Limit: -9°C

Designed for:

• Winter camping
• Cold-weather backpacking
• Mountain camps
• Late autumn and early spring trips
• Wild camping in exposed conditions

Key Features

3D Hood Profile
→ Improves warmth and comfort around the head

Redesigned Neck Baffle
→ Reduces heat loss and cold draughts

Differentiated Hood Drawcords
→ Easy adjustment by touch in low light

Shark Fin Foot Box
→ Extra insulation around the feet

Full-Length Insulated Zip Baffle
→ Minimises heat loss through the zip

YKK Auto Lock Two-Way Zip
→ Reliable operation and adjustable ventilation

Anti-Snag Zip Guard
→ Smooth opening and closing

Brushed Polyester Lining
→ Soft-touch comfort with excellent moisture transport

Internal Pocket
→ Secure storage for valuables

Compression Stuff Sack Included

Hanging Loops for Drying & Storage

PFAS-Free Construction

Specifications

Weight: 1685g

Packed Size: 36 × 24 cm

Shell Fabric: 50D 300T Polyester Taffeta

Insulation: OneThermo®

Lining: 230T Microfibre Polyester

Zip: YKK Auto Lock Two-Way Zip

Materials:

• Shell: 100% Polyester
• Lining: 100% Polyester
• Filling: 100% Polyester

Perfect For

• Winter Camping
• Wild Camping
• Backpacking
• Trekking
• Mountain Expeditions
• Bikepacking
• Cold-Weather Adventures

Spire Range Comparison

Robens Spire I -1°C Sleeping Bag
→ Lightweight three-season performance

Robens Spire II -4°C Sleeping Bag
→ Enhanced warmth for cooler conditions

Robens Spire III -9°C Sleeping Bag
→ Maximum warmth and cold-weather protection

Spire I = Lightweight & compact
Spire II = Versatile all-rounder
Spire III = Warmth & protection