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Sea to Summit Alpine ApII Sleeping Bag

Item# SEA012RL

Availability: Out of stock

$669.95 $398.94

over $50*

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By using the highest quality 850+ European down fill, Sea to Summit was able to get the Alpine ApII down sleeping bag under 3 lbs, an impressive feat for a full-feature winter mountaineering bag.

  • Contoured mummy shape is cut with a fitted hood, broader shoulder and large chest to maintain thermal efficiency and to accommodate extra layers in cold conditions
  • Differential allows lining to conform to your body without overlaps or gaps to eliminate cold spots
  • Offset baffle construction allows down to maintain full loft and minimize loss of heat through the seam lines
  • Side block baffle technique allows a 60-40 (top-bottom) fill ratio keeps top down uncompressed and you warmer
  • Lightweight 3D NanoShell™ shell uses Nano Durable Waterproof Repellent (DWR) to provide a high level of water repellency while 3D Barrier promoting fast evaporation to keep humidity from affecting down loft
  • Anatomically tapered foot box accommodates the natural position of the feet and is roomy enough for liners
  • Soft touch lining is down proof by construction, highly breathable and durable
  • Oversized neck collar, draft tube, and cushioned internal hood seal with dual adjustments keep drafts out
  • Anti-snag zipper system uses a high-density poly cloth hidden in the draft tube for smooth, snag-free zipping
  • Full length, two way zipper side and foot zip allow not only infinite ventilation, but conversion from a traditional mummy to a flat duvet
  • YKK #5 zippers allow this bag to unzip from the top and bottom for ventilation or to be used with another Sea To Summit bag (Trek, Traverse, and Alpine) of any size to create a double bag
  • Medium sized internal pocket is great for storing electronics to preserve battery life in cold conditions
  • Ultra-Sil® compression sack packs down from 15L to 5L
  • Compression sack, mesh storage sack, and laundry bag included
  • Max user height recommendations – 6'0'' Long – 6'7''
Shell fabric 3D NanoShell™ DWR Ripstop Nylon
Insulation type Down
Insulation material 850+ Fill Power Goose Down
Gender Unisex
Shape Mummy
Seasons 4
Stuff sack size 15L to 5L
Lining 20D Polyester
Temperature rating 16° F (-9° C) Comfort, 5° F (-15° C) Lower
Fill weight 1 lb 9 oz (710 g) - Regular
Weight 2 lbs 13 oz (1.29 kg) - Regular

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