Sea to Summit

Trek TkII Down Sleeping Bag 18°F / -8°C - Regular

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Past season
Traditional comfort and value, with an anything but traditional design approach, the Trek™ Series sleeping bags are the first choice of adventurers looking for maximum versatility in a moderately-priced sleeping bag.

Available in three different fill weights and three sizes, including Regular Wide.
Vertical baffles over the chest prevent down shift towards the sides of the bag during sleep, and the side block baffle construction maintains the 60/40 upper to lower fill ratio. The 3D sidewall baffle ensures that the down can loft to the very edge of the bag, and the hood and oversized draft tube help retain warmth. Lightweight fabrics-including a soft-touch 20D Nylon lining-reduce weight and packed volume.
The full-length two-way #5 Ykk side zip and secondary footbox zip offer unparalleled ventilation and allow the Trek to be used as a quilt. Zippers are backed by an effective anti-snag material.
A large internal pocket, perfect for keeping valuables close or batteries warm, completes the thoughtful design.

• Tapered rectangular cut offers more space than a mummy bag
• RDS 650+ Loft Ultra-Dry Down™
• Vertical chest baffles prevent down migration and cold spots
• Two-way #5 Ykk side/foot zips provide ventilation and allow bag to be used as a quilt
• Oversized zip draft tube with anti-snag materials
• Large internal security pocket
• 3D side-wall baffle maximizes loft right to the edge of the bag
• 3D hood draws in tight when needed
• Trek Tk III has a neck collar draft tube to seal and trap warmth
• Soft touch 20D lining fabric is lightweight and highly breathable, durable 30D Nylon shell
• Includes Ultra-Sil™ Compression Bag for compact storage
• Zip Coupling: This bag is designed to zip with another

• Max user height: < 183cm/6'
• Fill weight: 18oz/500g
• Weight: 2lbs 2oz/970g

• Comfort: 30°F/-1°C
• Lower limit: 18°F/-8°C
• Extreme: -13°F/-25°C

• Shoulder: 152cm(60“)
• Hip: 146cm(57“)
• Foot: 102cm(40“)


  • Men
  • Women
  • Adult
Temperature Rating
  • 0°C to -20°C
  • Responsible Down

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