The Trek series redefines the industry standard for the classic tapered rectangular sleeping bag, the TkII is a great all rounder.Suggested use
: Trekking; Travel; Hiking; Camping / Season ratings
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 of technical alpine sleeping bags, provides more space for the down to loft right to the edge of the bag.
An oversized security pocket inside the bag is ideal for stashing 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
- 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 : ULTRA-DRY Down™ 650+ Loft 85/15 Premium Duck Down
- Short: for people up to 170 cm
- Regular: for people 171 cm - 183 cm
- Long: for people 184 cm - 195 cm
Sea to Summit : Sleeping Bags : Trek
Colour of Product:
2D PermaShell Fabric, Ultra Dry Down 650+ Loft 85/15 Premium Duck Down
1.005 kg (Short) / 1.045 kg (Reg) / 1.130 kg (Long)
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.Hood Design
The Trek series use a 2-Dimensional cut. These hoods easily pull into a form fitted profile using the dual-adjustment drawcord.Internal Drawcords
Around the perimeter of the hood an internally constructed drawcord tunnel ensures the cord is buried deep within the down. When drawn closed the hood forms a comfortable seal around your face. A low profile Nifco dual cord adjuster is used for comfort and durability, offering a versatile fit. The hood closure uses a non-stretch cord for refined adjustment, while the neck collar uses an elastic cord to stretch with you as you move in the bag.Zips
All Sea to Summit sleeping bags use YKK zips. The Trek series uses YKK #5 reverse zips, this allows you to un-zip the sleeping bag from top and bottom for temperature regulation. Alpine, Traverse and Trek bags are fitted with a fixed zip length for all sizes. These bags can be zippered together in any combination of model and size.Anti-Snag Zip System
Neatly hidden in the draft tube is a super high-density 210D poly cloth. This fabric is exceptionally stiff and was originally engineered for use in high performance race sails. The lightweight, durable, stiff finish provides an excellent zipper anti-snag.Security Pocket
A large security pocket is located inside the chest area, it can fit a passport and wallet or be used to stow your electronic devices. Anti-snag coupled with a YKK Invisible Zip ensures an ultra low profile for comfort against the skin.
The 2D PermaShell™ Fabric:
Used in the Trek series sleeping bags, this is a high-density weave, 33 denier Nylon with a DWR finish. This material is highly vapour permeable and down proof by construction therefore it does not rely on coatings that reduce breathability and add weight.
- Repels moisture
- Retains loft
- Dries faster
- Anti-bacterial and anti-microbial
- Prolongs the life of your sleeping bag
In a world of technical brilliance it is remarkable that the performance of certain natural products have not been surpassed. Despite advances in modern fibre technology, down is still the best insulator warmth for weight, and is also the most durable sleeping bag insulation.
The problem with down is its vulnerability to water; moisture decreases the ability of the down to loft to its full potential and insulate, decreasing the warmth of your sleeping bag. Once down is damp or wet, it also takes a long time for it to dry out and effectively insulate again.
With the introduction of water-repellent ULTRA-DRY Down™ we have virtually eliminated the negative effects that moisture has on down. The ULTRA-DRY Down™ water-repellent treatment protects the down from external moisture and internal condensation.
ULTRA-DRY Down™ is a permanent* Nano-level water repellent polymer treatment applied to our high loft, high quality down. The Nano-thin treatment vastly improves our 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.
Sea to Summit sleeping bags, using ULTRA-DRY Down™ in combination with our already formidable 2D- and 3D-NanoShell™ system give you the best chance of sleeping warm and dry, day in day out throughout the worst of conditions.
With these technologies combined there is simply no reason to choose any other insulation or shell for your sleeping bag.
Loft is the volume for a given weight of down. It is used to describe the quality of down, relating directly to the insulating performance. High loft down is warmer for a given weight than low loft down. Higher lofting down will fill a larger volume of space for a given weight. As a result, less down weight is required to fill each baffle in a sleeping bag. This translates to a lighter sleeping bag. The most common measure of loft is called Fill Power. 850 Fill Power implies that one ounce of this down will loft to fill a volume of 850in3.
850+ Loft Goose Down
850+ Fill Power (Loft) Goose Down is the very best quality down available for sleeping bags. It provides the highest insulation for its weight and will last the longest.
Sea to Summit 850+ Loft series bags are all filled with Eastern European Mother Goose 850+ loft down.
Eastern European Goose Down is well renowned for its high quality, achieving the best loft, with the largest clusters that are strong and resilient, lasting for years.
650+ and 750+ Loft Premium Down
In the Sea to Summit Trek series, our 750+ and 650+ Fill Power Premium European duck down is a high quality insulation that sets the benchmark for sleeping bags in this class.
Use the pack - store - wash system supplied with all Sea to Summit sleeping bags, and you will ensure maximum loft from your bag.
To help you care for your sleeping bag and store it properly, all Sea to Summit sleeping bags are supplied with three storage sacks:
- 1 Sea to Summit Ultra-Sil® compression sack for easy packing
- 1 Oversized mesh storage cell to ensure the down maintains optimal loft during long periods of storage
- 1 Large cotton sack to protect your bag when laundering
Use the Sea to Summit Ultra-Sil® compression sack to pack and compress your sleeping bag for an expedition. Stuff your sleeping bag in from the foot first, tighten the drawcord and gently compress the stuff sack. To ensure the best performance from your sleeping bag, do not store under compression for long periods.
The mesh storage cell has been specifically designed to store your sleeping bag in between trips. Air out your sleeping bag thoroughly before storing and do not store damp. Store in a clean dry place. This storage cell will help maintain the loft of your sleeping bag.
The cotton laundry sack has your sleeping bag washing instructions printed on it. We recommend hand washing, if you use a washing machine, use only a front loading machine. Sea to Summit recommends the use of Granger’s™ down wash or similar. Use the laundry sack to protect your sleeping bag when tumble drying. Caution: use low heat/delicates setting only.
With the correct use of these three supplied storage sacks you can expect many years of warm cosy nights in your Sea to Summit sleeping bag.
Differential Cut Shell & Lining
Down insulates best when it is uncompressed and fully lofted. To help the down loft correctly, Sea to Summit uses a differential cut shell and lining. The top shell of all Sea to Summit sleeping bags is cut larger than the lining. This creates space in between for the down to loft fully.
In addition they use 3D side walls which gives the distinctive vertical sides to their sleeping bags, this further aids vertical loft along both sides of the bag. In the bottom of the bag, they use a reverse differential cut. By increasing the size of the lining relative to the shell, down lofts up to fill the voids around your body, torso, legs and the small of your back. Trapping heat close to the skin is essential for efficient warm sleeping.
Side Block Baffle & Fill Ratio
The loft is optimised using a side block baffle construction which allows the bags to be filled with a different ratio of down in the top and bottom. Sea to Summit sleeping bags have more down in the top of the bag where it is most effective as the down isn’t compressed by your body weight. The exact ratio of down fill must be matched to the shape of a sleeping bag.
The Micro bags’ slim fit forms a tight cocoon around the body, when you toss and turn at night, the bag rotates with you. For this style of bag it is best to use a 55/45 (top/bottom) fill ratio. In the Trek, Traverse and Alpine bags a 60/40 fill ratio is more suitable. These bags are a generous cut and have room inside to rotate without the bag following.
Q. What is the EN13537 Temperature Rating System?
This is the European standard for sleeping bag temperature ratings.
Everyone sleeps differently; some people are very warm sleepers while
others feel 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 EN13527 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:
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 use this rating
to decide the coldest temperature the sleeping bag is suitable for.
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.
Q. What colours do the sleeping bags come in?
The sleeping bags only come in one colour option for each series.
Q. What sizes are the sleeping bags available in?
A. Most sleeping bags are offered in 3 sizes.
- Short: for people up to 170 cm
- Regular: for people 171 cm - 183 cm
- Long: for people 184 cm - 195 cm
Q. What are the internal circumferences?
Chest / Hip / Foot
Regular 152 / 150 / 101 cm's
Long 162 / 157 / 108 cm's
Q. How small do they compress down to (when in compression sack)?
A. Please refer to individual models for this information.
Q. What is the warranty on the bag?
Sea to Summit offers a lifetime guarantee on all products against
manufacturing and material defects. This warranty does not cover wear
and tear. Should a fault develop in your product due to manufacturing or
a material defect, we will repair or replace it at our discretion. This
warranty is offered to the original owner of the sleeping bag if proof
of purchase can be provided.
We encourage you to register your sleeping bag on www.seatosummit.com.au/sleepingbags.
Q. What do I do if I have a warranty issue?
A. Please contact Travel Universe via the Online Help Centre.
Q. How do I look after my bag when it is not in use?
The best way to look after your sleeping bag is to air it out
thoroughly after use, then store your sleeping bag in the mesh storage
cell provided. Store in a clean dry place. Never store your sleeping bag
if wet or damp. If you think your sleeping bag is damp air it out for
as long as it takes to dry or tumble dry the sleeping bag in the cotton
sack on a low heat or delicates setting.
Q. Where are the sleeping bags made?
Sea to Summit source their sleeping bag components from locations all
around the world including Eastern Europe, Asia and the USA. The
manufacturing operations are in China as the existing infrastructure
allows us to best manage quality.
Q. Are you intending to make a women's bag?
No, but in both the Traverse and Trek series bags offer a short bag
which is ideal for women if you are under 170 cm (5\'7) in height.
Q. It seems that Sea to Summit has created some very nice sleeping bags, what is their policy in animal welfare?
Sea to Summit firmly believes in the humane treatment of animals
regardless of circumstance. They do not use any down that has been 'live
plucked'. All down supplied by their vendors are from ducks and geese
that are harvested for the meat industry, therefore the down and
feathers are collected as a by-product. The down is collected after the
birds have been processed and are no longer alive.
Sea to Summit
routinely ensures their vendors operate in strict adherence to their
own animal welfare policies, furthermore their down shipments are batch
certified to guarantee that the down is harvested by appropriate means
throughout the supply chain.
Q. My partner and I prefer to zip
our sleeping bags together. I am 6\'3 and she is 5\'9. If we got two
bags, a long and a regular, with opposing zippers, would the zippers be
the same length and could they zip together properly?
Alpine, Traverse and Trek bags are fitted with a fixed zip length for
all sizes. These bags can be zippered together in any combination of
model and size. The Micro series can be zipped together with other
Q. What are the benefits of down fillings?
In a world of technical brilliance it is remarkable that the
performance of certain natural products have not been surpassed. Despite
advancements in modern fibre technology, down is still the best
insulator warmth for weight. Down forms the lightweight undercoating of
birds, insulating them in very cold environments.
The down in
Sea to Summit sleeping bags is a by-product of the duck and goose meat
industry. Like most natural products, down quality depends on many
variables; predominantly the species, the feather content and the age.
The best quality down is sourced from older birds, consisting of large
plumes and clusters that create hundreds of thousands of tiny pockets,
trapping body heat to provide unmatched insulation.
does down have the best warmth to weight ratio, it is also the most
durable sleeping bag insulation. If kept dry and occasionally washed
using the recommended method, it will last a lifetime.
Q. What does "loft" mean?
Loft is a measure of volume for a given weight of down. It is used to
describe the quality of down, relating directly to the insulating
performance. High loft down is warmer for a given weight than low loft
down. Higher lofting down will fill a larger volume of space for a given
weight, as a result, less down weight is required to fill each baffle
in a sleeping bag. This translates to a lighter sleeping bag.
most common measure of loft is called Fill Power. 650 Fill Power
implies that one ounce of this down will loft to fill a volume of 650
cubic inches. 850 Fill Power implies that one ounce of this down will
loft to fill a volume of 850 cubic inches.