Sea To Summit Trek Tk III Down -5C Sleeping Bag - Regular

SKU:ATK3-R   PLU:139771
RRP $549.00
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The Sea To Summit Trek Tk III Down Sleeping Bag - Regular offers traditional comfort and value, with a new and stylish design! The Trek Series sleeping bags are perfect for globe-trotting adventures on a budget!


The ultimate sleeping bag doesn't exist. You like the mummy style, but it's too constricting. Traditional bags give you more room but don't hold up when the temperature drops. The Sea To Summit Trek TKIII fills the space between these two styles and offers you the best of both worlds! The tapered design provides a tighter fit than most traditional bags, which keeps you warmer without compromising on comfort.

Alpine sleeping bags can really burn a hole in your wallet, but there's no reason you shouldn't be able to enjoy some of the same technology in a more affordable but still quality unit. The 3D side wall at the top of the shell provides more space for the down-to-loft right to the edge of the bag. The quality of this bag is second to none with a 2D PermaShell fabric and premium 650+ Loft ULTRA-DRY Down. The fill ratio of the bag is maintained by utilising the side black baffle and a differential cut shell.

For the travellers, the bag features an oversized security pocket, providing you with safe storage for your passport, wallet, keys, or phone. Some travellers and hikers consider comfort to be a luxury, and with soft touch lining fabric that is downproof by construction, the Trek TKIII won't disappoint on this front. If you're travelling with a partner you can easily fully open up the bag using the full-length side and foot zip.

If you've been dreaming of a comfortable, cleverly designed, and versatile sleeping bag - you can finally stop the search and take home one of these incredible bags today.

This sleeping bag is recommended for users up to 183cm in height. If you need something larger, check out the Trek III Long version.



  • Tapered design
  • 3D hood
  • 2D PermaShell DWR shell fabric
  • Differential cut shell
  • 3D side walls
  • 60/40 fill ratio
  • Side block baffle
  • Zip draft tube
  • Anti-snag zip
  • Cushioned internal hood
  • Draw cord with dual adjustment
  • 2-way YKK #5 zips
  • Separate foot zip
  • Large sized internal zip pocket
  • Lightweight Ultra-Sil compression bag
  • Combined storage cell/laundry bag


Model: ATK3-R
UPC/ISBN: 9327868095407

Max User Height: Up to 183cm

Comfort Rating: -5°C

Lower Limit: -11°C

Extreme: -30°C

Compressed Volume: 8.4L

Compression Sack Volume: 14L to 4.5L

Packed Dimensions: 46cm x ø20cm

Chest Circumferance: 152cm

Hip Circumferance: 146cm

Foot Circumferance: 102cm

Fill Weight: 700g

Total Weight: 1190g


The Sea To Summit Trek Tk III Down Sleeping Bag - Regular is covered by the 12 Month Manufacturer's Warranty

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