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Sea To Summit - Alpine ApIII Sleeping Bag Long - Ultra-Dry Down, -20 C rated


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Sea To Summit - Alpine ApIII Sleeping Bag Long
Ideally suited to ski touring, mountaineering, winter trekking and expeditions Sea to Summit's ApIII Alpine Series sleeping bag has a range of cutting edge features designed to keep you warm in the most challenging conditions. The bag is a contoured mummy shape, designed to fit close to the body providing excellent thermal efficiency. It is filled with 850+ Loft Ultra-Dry Down which has a high level of water repellency and good warmth for weight. The bags outer is 3D NanoShell, a two layer construction designed to be water resistant and to also protect the down from internal condensation. The down is distributed with 60% on top and 40% in the base providing better insulation. The lining is soft, down proof and highly breathable for comfort.
  • Contoured mummy shape
  • Water resistant 3D NanoShell outer
  • Soft, downproof, breathable lining
  • Differential cut shell with 3D sidewalls
  • Offset baffles
  • Down distributed 60% on top, 40% in base
  • Side block baffle
  • Anatomically shaped boxfoot
  • Anti-snag zip draft tube
  • Neck baffle with dual elastic adjustment
  • Cushioned internal hood drawcord with dual adjustment
  • 2 way YKK zip
  • Internal zip pocket
  • Ultra-Sil compression bag included
  • Mesh storage cell and laundry bag included
Fill: Ultra-Dry Down, 850+ Loft, 90% Down cluster, premium European Goose Down
Fill Weight: 1000g
Bag weight: 1790g
Zip options Left hand zip
Temp rating: -12°C to -20°C
Season rating: Winter/Extreme
Compression Bag: Large: 20L to 6.5L

Video showing some features of Sea to Summit's Alpine Series Sleeping Bags:


Contoured Mummy Shape

Sea to Summit's contour mummy shape has been sized generously across the shoulders and chest to allow space for wearing extra layers in extreme conditions. There is knee room to allow turning and the boxfoot is oversized to give room for boot liners.
Ultra-Dry Down
Ultra-Dry Down has a water repellent treatment protecting the down from moisture and condensation. The water repellent polymer treatment vastly improves the downs water repellency without effecting it's weight or loft performance. Ultra-Dry Down retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. This not only helps insulate better in wet conditions but means Ultra-Dry Down bags dry much quicker too. The treatment also stops bacterial and microbial growth, making the bags more hygenic and giving them a longer life span.
3D NanoShell
3D NanoShell uses a two layer construction to protect sleeping bag down from both external moisture and condensation from vapour leaving the users body. The outer layer is windproof, water repellent and breathable. It acts to protect the down from external moisture. The inner layer is a thin non-woven silicone encapsulated layer. As vapour from the body moves through the down and comes in contact with the shell, if the temperature is low enough it will form as condensation on the inside of the shell. The hydrophobic properties of the inner layer traps the condensation close to the outer shell thus preventing the down from getting damp.
About Sea to Summit:
Sea to Summit is a manufacturer of Outdoor, travel and watersports equipment. Started in Perth, Western Australia they have steadily grown and now their products are sold in thirty five countries around the world. They produce innovative, durable, lightweight and compact gear for travellers and outdoor enthusiasts. Through ongoing research and development they strive to be at the cutting edge of product and manufacturing innovation, producing better made and better performing products for their ever growing customer base around the world.
Sea to Summits Philosophy:
“To equip and inspire. Our goal is to create such cool and useful gear that it motivates and inspires people to travel and lead an active, outdoor lifestyle. Every piece of gear is made to make you want to take it outside or travel with it, to make your trip lighter, to be more organised, more comfortable, more carefree so that no matter what the conditions, you can revel in being out there experiencing our wonderful planet.”



SKU 8624211
Brand Sea To Summit
Shipping Weight 2.0000kg

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