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Traverse™ Synthetic Sleeping Bag (25°F & 15°F)

TO TRAVERSE MEANS THINKING LATERALLY. MISSION ACCOMPLISHED

$179.00 – $219.00

Sleeping Bag Temperature Ratings Explained

The EN Rating scale is a scientific test to determine the warmth of a sleeping bag. The test produces a Lower rating (for male sleepers) and a Comfort rating (for female sleepers). Both are listed in the features table on the product page.

A unisex sleeping bag with a Lower limit of 23ºF means a man should be comfortable down to air temperatures of 23ºF. The same bag will also have a Comfort limit, in the realm of 32°F, so a woman would be comfortable down to an air temperature of 32ºF. These ratings require a sleeping mat with an R-Value appropriate for expected ground temperatures – without this, the sleeping bag itself is unlikely to keep the sleeper warm enough.

A variety of factors impact sleeping bag warmth - the above temperatures are merely guidelines, not guarantees. It’s important to think of a sleeping bag, an appropriately insulating sleeping pad and a liner as a sleep system. For example - if you plan on sleeping in nighttime air temperatures of 27ºF / -3°C, choose a bag with a gender-appropriate rating of 23°F / -5°C, plus a sleeping mat with an R-Value of 2.5 to 3, and consider a Reactor thermal liner.

$179.00
Description

The Traverse™ transitions easily into warmer weather with a full-length left-side zipper, a half-length right-side zipper, and a food box zipper provide that unparalleled ventilation or allow the Traverse to be opened completely flat like a comforter. In colder weather, the unique WaveLoft™ construction allows the Thermolite® insulation to expand out into air-trapping curves for maximum warmth.

Whatever the season, the wider cut of the Traverse gives you room to move, no matter what position you sleep in.

Is this synthetic sleeping bag…?

  • Warm enough for cool weather camping or travel? Yes. The Thermolite® insulation with WaveLoft™ construction is designed to keep you warm when the temperature drops. For cold rather than cool weather, you would probably choose the Traverse 15°F model – pair it with a high R-Value sleeping mat like the Comfort Light Insulated.

  • Able to be zipped to another sleeping bag? Yes. The main side zipper can be zipped to many Sea to Summit Unisex sleeping bags – Regular and Long bags have the same side zipper length.

  • Suitable for summer temperatures? Yes. A full-length side zipper, a second half-length zipper, and a foot box zipper can be opened for ventilation or to turn the Traverse into a fully-flat comforter in really warm weather.

Learn more about how the individual components of a sleep system can ensure a better night’s sleep HERE 

Highlights

Best Use

  • Backpacking

Performance

  • 2.5 Season: 25°F (comfort range 25°F to 70°F)
  • 3 Season: 15°F (comfort range 15°F to 65°F)

Shape

  • More room between hips and knees to allow you to sleep in a natural position without compressing the insulation and creating cold spots. Far more comfortable than narrow mummy bags for most sleepers.

FEATURES

  • WaveLoft™ construction and high-quality Thermolite® insulation are loftier and more durable for lasting warmth.
  • Full-length YKK® #5 main side zip and foot box zip provide superior ventilation and allow the bag to be used as a comforter.
  • Shaped hood and zipper draft tube keep the cold out and warmth in
  • Form a snug double sleeping bag by zipping to any Altitude™, Journey™ or Venture™ sleeping bag
  • Includes lightweight 70D nylon compression bag

Technical Features

WaveLoft™ Construction

WaveLoft™ is a unique construction technology designed to maximize loft and minimalize insulation weight. Instead of conventional flat layers of insulation (sewn flat on top of each other) or shingle layers (sewn in diagonally overlapping layers), WaveLoft™ creates curved layers which expand out from the shell to trap the greatest amount of air possible at a lower overall weight than existing synthetic insulation constructions.

WaveLoft™ is used on all Sea to Summit synthetic-insulated sleeping bags, regardless of price level.

Thermolite® HL-1

Thermolite® HL-1 is part of the family of Thermolite® materials used in Sea to Summit sleeping bags, sleeping bag liners and sleeping mats. HL-1 high loft insulation is a fiberfill constructed with a unique 3D crimp of hollow-core and solid fibers, which provides excellent lightweight warmth with superior durability. The Thermolite insulation lofts up inside the Air Sprung Cells™ of our sleeping mats to prevent convective heat loss from your warm body to the cold ground.

Zip Coupling

Down and synthetic bags identified with our zip coupling symbol use a 65 inch #5 YKK full-length zip which allows a unisex left-handed and women's specific right-handed bag to pair together.

Designed to pair side by side, each person sleeps in their own bag enabling each of you to take advantage of your bag's unique insulation zones, hood and footbox features - perfect for cozy adventures for two.

Bags with full-length #5 YKK zips on both sides can also be coupled together with other pairing bags.

Free Flow Zip

Our Free-Flow triple-zip design ensures your sleeping bag retains maximum warmth and efficiency when needed and multiple ventilation options when it's not. 

The half-zip on the right side of the bag (left side on women's bags) provides freedom of movement for both arms, additional ventilation and allows the top third of the bag to be folded down as a mini quilt when the mercury climbs higher than expected.

Tech Specs

Product Details

Best Use
Backpacking
Comes With
70D Nylon Compression Sack
Insulation
Polyester (using WaveLoft™ construction)
Shell Fabric
Durable 30D DWR Nylon shell
Zip Options
Main side zip and foot box zip provide superior ventilation and allow the bag to be used as a comforter.
 
25°F REGULAR
25°F LONG
15°F REGULAR
15°F LONG
BAG SERIES
BAG WEIGHT
COMPRESSED VOL (ASTM STANDARD)
COMPRESSION SACK
FITS UP TO
SEASON RATING
TEMPERATURE (EN RATING)
WOMEN'S TEMP (EN RATING)
Traverse 2
2lbs 7.9oz / 1130g
7.3 L
S - 10L to 3.3L
6 ft / 183 cm
2.5 Season
25°F (Lower Limit)
35°F (Comfort Limit)
Traverse 2
2lbs 12.8oz / 1270g
8.1 L
M - 14L to 4.5L
6 ft 4 in / 192 cm
2.5 Season
25°F (Lower Limit)
35°F (Comfort Limit)
Traverse 3
3lbs 2.8oz / 1440g
9.8 L
M - 14L to 4.5L
6 ft / 183 cm
3 Season
15°F (Lower Limit)
27°F (Comfort Limit)
Traverse 3
3lbs 10.9oz / 1670g
12.1 L
L - 20L to 6.5L
6 ft 4 in / 192 cm
3 Season
15°F (Lower Limit)
27°F (Comfort Limit)

Customer Reviews

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