Naturehike Snowbird 4 Season 650FP Duck Down Sleeping Bag
Availability: In stock
SPECIFICATIONS
Key Specifications:
Fill Power: 650FP Premium Duck Down
Down Cluster Percentage: 85% (Higher Warmth-to-Weight Ratio)
Shell Fabric: 20D Ripstop Nylon with Durable Water-Repellent (DWR) Coating
Zippers: Anti-Snag YKK® Zippers
Buckles: Duraflex® Heavy-Duty Buckles
Models & Temperature Ratings (EN Standard):
Model Fill Weight Comfort Limit (℃/℉) Extreme Limit (℃/℉)
SP400 400g +3.8℃ / 38.8℉ +1.4℃ / 34.5℉
SP550 550g -1.5℃ / 29.3℉ -7.6℃ / 18.3℉
SP700 700g -7.3℃ / 18.9℉ -14.5℃ / 5.9℉
SP1000 1000g -10.8℃ / 12.6℉ -18.6℃ / -1.5℉
Size Options:
Regular: 190×75 cm (6'3"×29.5")
Wide: 205×80 cm (6'9"×31.5") - Ideal for users needing extra space
Colors Available: Grey
/Brown
Premium Features:
✅ 650FP Duck Down - Superior loft retention & compressibility
✅ 3D Hood Design - Adjustable drawcord locks in warmth
✅ Shoulder Baffle - Prevents heat loss around zipper
✅ Foot Box Venting - Internal zipper regulates temperature
✅ Anti-Draft Collar - Insulated tube blocks cold air entry
Usage Notes:
⚠️ Must Use with Sleeping Pad - Protects fabric from abrasion on rocky/hard surfaces
⚠️ Dry Storage Only - Maintains down’s thermal performance
Why Choose Snowbird?
Engineered for ultralight backpackers demanding reliable warmth-to-weight ratios, this mummy bag combines weather-resistant fabrics with ethically sourced duck down. The trapezoidal foot design enhances mobility while minimizing dead air space.
