Sea To Summit - Trek TkII Sleeping Bag Long - Ultra-Dry Down, -8 C rated

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Great value, down sleeping bag in a tapered rectangular shape. Sea to Summit's Trek TkII is versatile, comfortable, warm and features 650+ loft Ultra-Dry Down

Sea To Summit - Trek TkII Sleeping Bag Long

Sea to Summit's Trek TkII is an excellent value, down filled sleeping bag boasting a range of features generally reserved only for higher end bags. It's a classic tapered rectangular shape with both full length side and foot zips. When fully zipped up it provides an excellent balance of thermal efficiency and roominess. On warmer nights the bag can be opened out fully to become a duvet. To optimise the down's insulation the bag is differential cut and a side block baffle maintains 60/40 fill ratio. The top of the shell has a box wall construction allowing the down to loft right to the edges of the baffles eliminating cold spots. The fill is water resistant, 650+ loft Ultra-Dry Down and the shell Sea to Summit's 2D PermaShell which is down proof, very breathable and treated with a DWR. Inside the bag there is a zippered security pocket and a dual drawcords around the hood to help seal in the warmth on colder nights.

  • Classic tapered rectangular shape
  • Down proof, highly breathable  2D PermaShell with DWR
  • Soft, downproof, breathable lining
  • Differential cut shell with 3D sidewalls
  • Down distributed 60% on top, 40% in base
  • Side block baffle 
  • Anti-snag zip draft tube
  • Cushioned internal hood drawcord with dual adjustment
  •  Full length 2 way YKK zip down side and along foot
  • Internal zip pocket
  • Ultra-Sil compression bag included
  • Mesh storage cell and laundry bag included
Fill: Ultra-Dry Down, 650+ Loft, 85% Down cluster, premium Duck Down
Fill Weight: 550g
Bag weight: 1110g
Zip options Left hand zip
Temp rating: -1°C to -8°C
Season rating: Indoor/summer/spring/autumn
Compression Bag: Small: 10L to 3.3L

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


Tapered Rectangular Shape

Sea to Summit's tapered rectangular shape provides an excellent balance of comfort, roominess and thermal efficiency. Featuring both full length side and foot zips it is possible to open the sleeping bag out to become a duvet in warmer conditions or when used indoors.
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.
2D PermaShell
2D PermaShell is a high density weave, 33 denier nylon. It is down proof, very breathable and treated with a DWR to provide added water resistance.

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.” Logo Sea to Summit Logo See All Sea to Summit Sleeping Bags See All Down Sleeping Bags 


Barcode # TK2-L550L-UD
Brand Sea To Summit
Shipping Weight 1.3100kg

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