Traverse Synthetic Sleeping Bag (25°F)


Size: Long
Sale price$229.00

Product Details

The Sea To Summit Traverse™ Sleeping Bag 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 mummy cut of the Traverse gives you room to move, no matter what position you sleep in.


Best Use

  • Backpacking


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


  • 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.
Comes With
  • 70D Nylon Compression Sack
  • Polyester (using WaveLoft™ construction)
  • Mummy
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.


  • 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



  • 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.

25°F Regular 25°F Long
Bag Series
Traverse 2
Traverse 2
Bag Weight
2lbs 7.9oz / 1130g
2lbs 12.8oz / 1270g
Compressed Volume (ASTM Standard)
7.3 L
8.1 L
Compression Sack
S - 10L to 3.3L
M - 14L to 4.5L
Fits Up To
6 ft / 183 cm
6 ft 6 in / 198 cm
Season Rating
2.5 Season
2.5 Season
Temperature (EN Rating)
25°F (Lower Limit)
25°F (Lower Limit)
Women's Temperature (EN Rating)
35°F (Comfort Limit)
35°F (Comfort Limit)

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