Sea To Summit Trek Series TK I

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 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.

lightest of all our Trek sleeping bags, ideal for globetrotters travelling to Glastonbury or Rio.

Features: Tapered rectangular, 2D PermaShell™ DWR shell fabric, differential cut shell with 3D side walls, 60/40 fill ratio, side block baffle, zip draft tube with anti-snag, cushioned internal hood drawcord with dual adjustment, 2 way YKK #5 zips with separate foot zip, large sized internal zip pocket, includes lightweight Ultra-Sil® compression bag, mesh storage cell and laundry bag.
 

Down: 650 Loft 85/15 Premium Duck Down
Fill weight: Regular 350 g/12 oz | Long 400 g/14 oz
Bag weight: Regular 830 g/1 lb 13 oz | Long 970 g/2 lb 2 oz
Length / zip options: Regular - left or right zip | Long - left zip
Season ratings: Indoor/Summer
Suggested use: Trekking, Travel, Hiking, Camping
Compression bag: Small - 10L to 3.3L


EN13537 Temperature Rating System

EN13537 is a European standard for sleeping bag temperature ratings.

Everyone sleeps differently; some people are very warm sleepers while others feel the cold easily. There are many factors that affect your warmth and comfort in a sleeping bag. An important factor is that you use a good insulating mat, so your body heat isn’t drawn into the cold ground you are sleeping on. Other factors include your tent or shelter, gender and metabolism, clothing, sleeping bag liner, use of the hood and your daily calorie intake.

Although the EN13537 standard does not identify a single precise temperature a tested sleeping bag is suitable for, it does provide an industry standardised temperature range that a typical user can refer to as a guide for the conditions their bag will be most comfortable in.

The EN13537 standard provides three temperature levels to guide a consumer in their choice

Comfort - the temperature at which a standard woman can expect to sleep comfortably in a relaxed position. If you consider yourself a cold sleeper use this rating to decide the coldest temperature the sleeping bag is suitable for.

Lower Limit - the temperature at which a standard man can sleep for eight hours in a curled position without waking. If you consider yourself a warm sleeper you can use this rating to decide the coldest temperature the sleeping bag is suitable for.

Extreme - this is a survival only rating for a standard woman. Between the lower limit and the extreme rating a strong sensation of cold has to be expected and there is a risk of health damage due to hypothermia. This is an extreme survival rating only, we do not recommend you rely on this rating for general use.