Sea to Summit Trek TKI Down Sleeping Bag

$549.99 Special Price $329.99 you save: $220.00 (40%)
In stock
Only %1 left
Check In Store Availability

The new Trek™ TKI Sleeping Bag has vertical baffles in the chest area so the ULTRA-DRY Down™ 650+ loft duck down stays put with a side baffle maintaining a 60/40 fill ratio so that there is more down on the top of the bag for maximum insulation. Other features include lightweight fabrics to cut down on weight and packed size, a panelled hood with a drawcord for when you need the extra warmth and a foot zip for ventilation which, along with the full-length side zip, allows you to use the bag as a quilt. The Trek TKI is the perfect compromise between comfortable roomy bags and warm trim-fit mummy bags for your summer camping and adventure travel adventures.


  • Tapered rectangular for more space and comfort than a traditional mummy bag
  • Responsible Down Standard 650+ Loft ULTRA-DRY Down™ offers excellent insulation and compressibility
  • Lightweight fabrics for reduced weight and bulk
  • Soft touch 20D, down-proof lining fabric is lightweight and highly breathable, durable 30D Nylon shell
  • Vertical chest baffles prevent down migration and cold spots
  • Two-way #5 YKK® side and separate foot zip allows bag to double as a quilt and provides extra ventilation options
  • Oversized zip draft tube with anti-snag materials
  • Large internal security pocket
  • 3D side-wall baffle maximises down insulation right to the edge of the bag
  • 3D hood draws in tight when needed
  • Trek Tk1 has baffled top and stitch through base construction
  • Includes Ultra-Sil™ Compression Bag for compact storage
  • This bag is designed to pair with another


Featured Gear Summer Clearance 2024
Fits to 183cm (Regular and Regular Wide), 198cm (Long)
Shoulder Width 76cm (Regular), 86cm (Regular Wide), 81cm (Long)
Foot Width 51cm (Regular), 61cm (Regular Wide), 54cm (Long)
Compression Compression bag, compressed volume:
10 to 3.3 Litres, 4.6 Litres (Regular)
10 to 3.3 Litres, 6.2 Litres (Regular)
10 to 3.3 Litres, 5.5 Litres (Regular)
Fill ULTRA-DRY Down™ 650+ Loft Duck Down (min. 85% down)
Fill Weight 350g (Regular), 450g (Regular Wide), 400g (Long)
Average Weight 760g (Regular), 920g (Regular Wide), 850g (Long)
Outer Material 30D nylon
Inner Material 20D nylon
Temperature Rating 5°C comfort EN13537 rating woman / minus 1°C Lower comfort EN13537 rating for men

ULTRA-DRY Down™: With the introduction of water-repellent ULTRA-DRY Down™ Seat to Summit have virtually eliminated the negative effects moisture has on down. The ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and condensation from inside the bag. It is a permanent (no loss of treatment effect has been seen in over 14 wash cycles) Nano-level water repellent polymer treatment applied to Sea to Summit high loft, high quality down. The Nano-thin treatment vastly improves the down's reaction to water without effecting its weight or loft performance. ULTRA-DRY Down™ retains over 60% more loft and absorbs 30% less moisture when compared with untreated down. Sea to Summit sleeping bags dry out 60% faster than bags with untreated down. The Nano-level treatment also inhibits bacterial and microbial growth, which makes Sea to Summit sleeping bags more hygienic and improves their lifespan.

Responsible Down Standard (RDS): The RDS is helping to shift the entire down and feather industry towards more humane animal rearing and handling practices. Overseen by the industry leading Textile Exchange, the RDS requires independent, third party assessments of all aspects of animal rearing and handling throughout the entire supply chain. By only using down that meets the audited requirements of the RDS we can have confidence that each phase of the collection process has been completed with the welfare and ethical treatment of waterfowl in mind. To find out more about how the RDS is improving animal welfare during down collection, please visit (link will open a new window).



Write Your Own Review
You're reviewing:Sea to Summit Trek TKI Down Sleeping Bag
Your Rating
© 2024 Bivouac Outdoor All Rights Reserved.