Sea to Summit Alpine 2 ApII -20°C High Altitude 850 loft Down Sleeping Bag - Long, Left Hand Zip Sale


Sea to Summit Alpine 2 ApII -20°C High Altitude 850 loft Down Sleeping Bag - Long, Left Hand Zip

Sea to Summit Alpine 2 ApII -20°C High Altitude 850 loft Down Sleeping Bag - Long, Left Hand Zip

Sea to Summit

$617.00 $734.00

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Designed for high altitude mountaineering and arctic conditions, the contoured mummy design of the Sea to Summit Alpine 2 Down Sleeping Bag delivers efficient insulation, while the updated expedition sizing provides space for extra clothing to be worn inside the bag. The anatomically shaped and oversized footbox can comfortably accommodate boots when necessary.

Sea to Summit's Alpine™ Sleeping Bag Series combines their most technical sleeping bag features to deliver reliable performance while cocooning you in the highest quality RDS 850+ Loft Goose ULTRA-DRY Down™.

Vertical baffles over the chest section ensure the down insulation cannot migrate or shift to the outside of the bag during sleep, creating cold spots. A side block baffle construction maintains the 60/40 fill ratio, keeping more down on the top of the bag for maximum insulation. ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from the inside of the bag, virtually eliminating the negative effects moisture has on down. All Sea to Summit Down Sleeping Bags use Responsible Down Standard (RDS) certified down. The Free-Flow Zip system provides a half zip on the right side of the bag to provide freedom of movement for both arms as well as additional ventilation. The full length, two-way left side zip provides easy access and extra ventilation options. Waterproof and breathable NanoShell™ fabric provides protection from wind and moisture. The tightly sized and carefully panelled hood fits snugly around your head, allowing you to maintain maximum warmth with minimal adjustment. An oversized zipper draft tube is fitted with the lightest and stiffest anti-snag materials for effortless operation and to prevent heat loss through the zipper. 


  • Contoured mummy shape for efficient insulation
  • Expedition sizing for extra space and layered clothing
  • Anatomically shaped and oversized footbox can accommodate boots
  • Free-Flow half right-side zip for freedom of movement and additional ventilation
  • Large internal security pocket
  • Includes lightweight Ultra-Sil™ compression bag and storage cell


     Down Type RDS Ultra Dry 850+ Loft  European Goose Down for maximum insulation
    Fill Weight Regular: 800g Long: 920 g
    Sleeping Bag Weight Regular: 1340 g Long:1500 g
    Fill Ratio: Top/Bottom 60:40
    Baffle Design Side block offset baffle
    Shell Design Contoured mummy, differential cut shell with 3D side walls
    Outer Shell Fabric 20D Nylon, soft touch, ultra breathable high density down proof weave
    Length / Zip Options Regular - left hand zip
    Zip Draft Tube Yes with anti-snag
    Neck Draft Tube Yes with dual-elastic adjustment
    Zip YKK #5 reverse zip
    Security/Battery Pocket Yes
    Recommended height for user Regular - up to 183 cm  Long: 183 to 198 cm
    Chest circumference Regular -160cm  Long: 168 cm

    Hip circumference

    Regular - 142 cm Long: 150cm

    Foot circumference

    Regular - 131  Long: 145cm
    EN Temperature Rating Comfort: -12°C Lower Limit: -20°C Extreme: -42°C
    Suggested Use Winter trekking, Snow camping, Ski touring, Alpine climbing, Expeditions
    Compression Bag Large - 20 to 6.5 Litres
    Dimensions 227 x 89 cms

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