First AscentAmplify Down 900 Sleeping Bag

About

Built for serious cold-weather adventures. The First Ascent Amplify Down 900 Sleeping Bag is a high-performance expedition sleeping bag designed for freezing conditions, high-altitude trekking, and multi-day mountain expeditions.

Using premium responsibly sourced down and thermal efficiency construction, it delivers maximum warmth-to-weight performance while still packing down small for travel and expeditions.

Ideal for routes like Kilimanjaro, Mt Kenya, and Everest Base Camp, where temperatures drop well below freezing.

Product Features

• Premium Goose Down Insulation: High-loft 650 fill power for superior warmth-to-weight ratio
• Extreme Cold Rating Design: Built for sub-zero expedition conditions
• Draft Collar System: Locks in heat and prevents cold air entry
• Differential Cut Construction: The outer shell is larger than the inner lining for maximum loft
• Elastic Amplify Stitching: Expands with movement while reducing heat loss in key zones
• Internal Security Pocket: Store valuables, phone, or batteries safely
• Heat Retention Layer: Reflective inner construction improves thermal efficiency
• Mummy Shape Design: Reduces air space for faster heat retention
• Responsibly Sourced Down: Ethical insulation fill
• ISO Tested Performance: Certified temperature performance standards

Product Specifications

Temperature Ratings

• Comfort Rating: -8°C
• Transition/Limit Rating: -15°C
• Extreme Survival Rating: -36°C (survival-only condition)

Weight

• Total Weight: ~1.7 kg

Dimensions & Pack Size

• Dimensions (laid flat): 220 × 80 / 55 cm
• Packed Size: 22 × 39 cm

Materials & Fill

• Insulation Type: Goose down (92/8 blend)
• Fill Power: 650 FP
• Shell Construction: Lightweight ripstop nylon outer
• Inner Lining: Soft-touch polyester
• Design Focus: Loft retention + thermal efficiency
• Zipper:
  • Left-handed
  • Right-handed

Intended Use

• Expedition hiking
• High-altitude trekking
• Cold-weather camping
• Multi-day mountain travel
• Warranty: 6 months

What's in the Box?

• 1x Amplify Down 900 Sleeping Bag