Down Sleeping Bag

When cold-weather camping demands serious insulation without the weight penalty, down sleeping bags deliver unmatched warmth-to-weight performance. The military surplus sector has long recognised down's compressibility advantages for extended operations, where pack space and load management prove critical. Modern down bags balance traditional insulation principles with hydrophobic treatments that address down's historical moisture vulnerability.

How to Choose a Down Sleeping Bag

Temperature Rating (ISO 23537 Standards) Down bags typically display Comfort, Limit, and Extreme ratings. Comfort indicates the temperature at which a standard sleeper remains warm throughout the night. Limit suits experienced users comfortable with cooler conditions. For UK hillwalking in three-season conditions, bags rated Comfort 0°C to -5°C cover most requirements. Winter expeditions demand ratings extending to -10°C or lower.

Fill Power (CUIN Rating) This metric measures down's loft efficiency per ounce. Higher numbers indicate superior insulation with less weight. 600-700 CUIN represents reliable warmth for general camping. 800+ CUIN suits ultralight trekking where every gram matters, though costs increase accordingly. Military specifications traditionally favour 650-750 CUIN for proven durability across varied conditions.

Hydrophobic Treatment Down's primary weakness remains moisture absorption. Hydrophobic (water-resistant) down maintains loft when damp, extending usable conditions. This treatment proves particularly relevant in Britain's unpredictable climate, where condensation and unexpected weather test equipment limits. Untreated down requires meticulous storage and careful campsite selection.

Weight and Pack Size Down's compressibility advantage becomes evident on multi-day treks. A quality 800 CUIN bag compresses to approximately 6-8 litres, compared to 12-15 litres for equivalent synthetic insulation. Weight savings typically range from 200-400g, significant when calculating total pack load for extended trips.

Ethical Sourcing (RDS Certification) Responsible Down Standard certification verifies ethical treatment throughout the supply chain. This addresses legitimate concerns about down sourcing practices whilst ensuring product traceability.

Why Choose Us

• Military surplus down bags offer field-proven performance without premium retail pricing.

• Stock covers temperature ranges from three-season touring to winter expeditions.

• Down insulation remains serviceable for 10-20 years with proper maintenance and storage.

• Selection includes mummy-style bags for thermal efficiency and semi-rectangular designs for additional space.

• Reinforced construction emphasises durability over fashion, with robust shell fabrics built for extended field use.

Free UK Delivery - 30 Day Refund Warranty

Free delivery applies to all orders across the UK. Returns accepted within 30 days for unworn items in original condition.