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Sea to Summit Trek TkII 18F Down Sleeping Bag - Not Available

Click to enlarge image of Sea to Summit Trek TkII 18F Down Sleeping Bag


Sea to Summit Trek Tk II Sleeping Bag redefines the industry standard for the classic tapered rectangular sleeping bag. The TkII is a great all rounder. Incorporating 2D PermaShell™ fabric and a premium 650 loft down, the Trek bags are a refined classic. The 60/40 fill ratio in the Trek bags is maintained using a side block baffle and differential cut shell. In the top of the shell a 3D side wall, a feature normally reserved for technical alpine sleeping bags, provides more space for the down to loft right to the edge of the bag.

An oversized security pocket located inside the bag is easily accessible, ideal for stashing passports and other valuables while travelling. The soft touch lining fabric is down proof by construction and highly breathable offering a comfortable sleep. The Trek series is our choice for adventure travel and globe-trotting. Whether sleeping in hostels throughout Europe, backpacking South America or discovering the Stirling Ranges in Western Australia.

The tapered rectangular design offers a good compromise between the comfort of a generous cut shape and warmth of a closer fit. A full length side and foot zip allow the Trek series to be opened out into a full duvet for use indoors and warm weather.


  • Tapered rectangular
  • 2D PermaShell™ DWR shell fabric
  • Differential cut shell with 3D side walls
  • 60/40 fill ratio
  • Side block baffle
  • Zip draft tube with anti-snag
  • Cushioned internal hood drawcord with dual adjustment
  • 2 way YKK #5 zips with separate foot zip
  • Large sized internal zip pocket
  • Includes lightweight Ultra-Sil® compression bag, mesh storage cell and laundry bag
  • Down: Ultra-Dry Down™, 650+ Loft, 85% Down cluster, premium Duck Down
  • Fill weight: Short 500 g/18 oz | Regular 500 g/18 oz | Long 550 g/19 oz
  • Bag weight: Short 1000 g/2 lb 3 oz | Regular 1020 g/2 lb 4 oz | Long 1110 g/2 lb 7 oz
  • Length / zip options: Short - right zip | Regular - left or right zip | Long - left zip
  • Season ratings: Indoor/Summer/Spring/Autumn
  • Suggested use: Trekking, Travel, Hiking, Camping
  • Compression bag: Small - 10L to 3.3L


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