The Trek™ down sleeping bag brings the comfort of a tapered-rectangular shape and the versatility of a dual-zip ventilation system to wherever your travels may take you. The full-length side zipper and secondary foot box zipper allow you to increase ventilation or open the Trek completely flat like a comforter, and the quality down will keep you warm and snug on chilly nights.
The broader cut gives you room to move inside the bag, regardless of the sleeping position you may adopt. A Regular Wide model is available for those who really appreciate extra girth.
Light and compact, the Trek might just become your favorite trekking / backpacking / travel / camping down sleeping bag.
Is this down sleeping bag…?
Warm enough for cool weather camping or travel? Yes. The quality down and 3D hood keeps you warm when the mercury drops. For colder-weather use, you would probably choose the Trek 10°F which has a draft collar – pair it with a high R-Value sleeping mat like the Comfort Light Insulated.
Suitable for summer temperatures? Yes. A full-length side zipper and a secondary foot box zipper can be opened for ventilation or to turn the Trek into a fully-flat comforter in really warm weather.
Able to be zipped to another sleeping bag? Yes. The main side zipper can be zipped to many Sea to Summit Women’s sleeping bags – Regular and Long bags have the same side zipper length.
Learn more about how the shape, construction and down quality of a sleeping bag affect how well you sleep HERE
All outdoor activities
2 Season: 30°F (comfort range 30°F to 70°F)
More room between hips and knees to allow you to sleep in a natural position without compressing the down insulation and creating cold spots.
ULTRA-DRY Down 650+ Loft 85% Down Cluster Premium Duck Down certified Responsible Down Standard (RDS)
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 oversized zipper draft tubes (Trek 10°F also has a draft collar, fits snugly around shoulders) to seal in warmth and keep cold out.
Internal pocket for phone / GPS / valuables
Form a snug double sleeping bag by zipping to any Altitude™, Journey™ or Venture™ sleeping bag
Includes lightweight Ultra-Sil™ compression bag and storage cell
The Ascent™ down sleeping bag redefines what versatile means in a sleep system. Complex construction and high-quality down keep you warm when it’s cold outside, while the triple-zipper Free-Flow Zip™ system ensures you stay cool and ventilated when the weather warms.
Shaped to allow a natural sleeping position for comfort, the Ascent is light and compact enough to go everywhere your adventures may take you.
Is this down sleeping bag…?
Warm enough for cold-weather use? Yes. The high-lofting down, technical hood, oversized draft tubes, and draft collar make the Ascent 25°F and 15°F true 2.5 – 3 season bags. For colder weather, you might choose the Ascent 0°F model and pair it with a high R-Value sleeping mat like the Comfort Light Insulated.
Really cool in summer temperatures? Yes. The Free-Flow Zip system means separate zippers on your left and right side and in the foot box. Open them for ventilation or to turn the Ascent into a fully-flat comforter.
Able to be zipped to another sleeping bag? The main side zipper can be zipped to the Sea to Summit Women’s Altitude, Journey and Venture sleeping bags – Regular and Long bags have the same side zipper length.
Read up on how the shape, construction and down quality of a sleeping bag will affect how well you sleep HERE
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 down insulation and creating cold spots. Far more comfortable than narrow mummy bags for most sleepers.
ULTRA-DRY Down 750+ Loft 90% Down Cluster Premium Duck Down certified Responsible Down Standard (RDS)
Free-flow zipper system: full-length YKK® #5 main side zip, half-length opposite side zip, and foot zip provides unparalleled ventilation and use as a comforter.
Vertical baffles over the chest to prevent down shifting as you roll over in your sleep.
Shaped hood, oversized draft collar, and zipper draft tube keep the cold out and the warmth in.
Internal pocket for phone / GPS / valuables.
Form a snug double sleeping bag by zipping to any Altitude™, Journey™ or Venture™ sleeping bag.
Includes lightweight Ultra-Sil™ compression bag and storage cell.
Ultra-Sil™ compression bag and storage cell
Ultra-Dry Down 750+ Loft
Lightweight 20D Nylon Shell
Free-Flow zipper system