Sea to Summit's Trek series of sleeping bags offer technical construction and high quality materials in a bag with a roomy shape and generous cut that can be unzipped flat to create a duvet.
Sea to Summit says:
The lightest of all our Trek sleeping bags. The classic tapered rectangular sleeping bag – redefined!
Incorporating our 2D PermaShell fabric and a premium 650 loft down, the Trek bags are a refined classic. The 60/40 fill ratio in the Trek Tk1 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.
Tapered rectangular sleeping bags:
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.
Sea to Summit's Trek sleeping bags are designed for people who don't like to be restricted by a close fitting mummy bag, the tapered shape provides more room to move around and the two way zip that goes down the left side and across the foot gives even more flexibility for venting or opening the bag out to form a duvet.
There's no boxing at the foot but the bag is big enough for that not to matter. There's a compromise with regard to warmth, spacious bags are not as warm as close fitting ones because the air moves around a lot more.
The Trek series bags are filled with 650 Fill Power down, which fits with its focus as a more generous bag rather than a highly focused ultralight offering, and with a larger bag you need more down to fill it, so in the TKI there's 400grams, which is a lot. Its hydrophobic down down as well - which means it'll perform better if the bag gets damp.
If you want a more generous bag but want the improved performance of a technical construction and high quality materials then the Trek series is worth serious consideration.
- Reviewed by BasecampGear
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