BEST USE: Camping & Backpacking
PERFORMANCE: 2.5 Season
WEIGHT: 2lbs 4.7oz | 1040g
COMPRESSED VOLUME: 7.1 liters
LOWER TEMP RATING: 30ºF | -2ºC
Shipping & Returns
Our warehouse is actively shipping orders from 8am to 1pm MST Monday through Friday. Most orders ship in one business day, but the transit time can take up to 7 days, depending on your distance from Boulder, Colorado.
2nd Day and Next Day Air orders will ship same day if placed by 1pm MST, Monday-Friday (except holidays).
All orders are eligible for fast and easy returns within 60 days of purchase.
For more details, please check out our Help Center
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 14ºF means a man should be comfortable down to air temperatures of 14ºF. The same bag will also have a Comfort limit, in the realm of 27°F, so a woman would be comfortable down to an air temperature of 27ºF. 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.
If you are new to outdoor recreation, or you only camp occasionally, the Trailhead synthetic mummy sleeping bag is a great value option. However, that doesn't mean we've cut corners on comfort and versatility. Like all Sea to Summit synthetic mummy sleeping bags, the Trailhead utilizes WaveLoft construction to allow the insulation to expand out into air-trapping curves for maximum warmth.
As the temperature rises, the full-length zipper (which curves around through the foot box) allows you to sequentially increase ventilation to the point where the mummy sleeping bag can be opened flat and used as a quilt.
The tapered-rectangular mummy cut of the Trailhead gives you plenty of room to move, regardless of your sleeping position.
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.
Sea to Summit sleeping bags do not contain PFCs.
Ultra-Dry Down™ uses a non-PFC hydrophobic treatment to ensure it absorbs less moisture and dries more quickly. The treatment does not affect the breathability or the lifespan of the down and lasts through at least 20 washings.
The down used in our sleeping bags is RDS-certified responsibly sourced.
Down and synthetic-insulated sleeping bags utilize a non-PFC DWR treatment on the shell fabric for external moisture repellency. This helps prevent the insulation from becoming damp if the sleeping bag comes into contact with condensation on a tent wall, for instance.
Best UseBackpacking, Travel, Camping
Comes WithStuff Sack
InsulationPolyester (using WaveLoft™ construction)
Shell Fabric30D nylon treated with DWR
Zip OptionsFull length left side zipper with two sliders. Unzip fully to use as a quilt or comforter
|20°F Regular Wide
|30°F Regular Wide
|30°F Long Wide
Frequently Asked questions
Is this sleeping bag warm enough for cold-weather camping or travel?
Perhaps. You would need the Trailhead III sleeping bag since its Waveloft insulation maximizes loft. We also recommend pairing this bag with a 3.5+ R-Value sleeping pad, like our Comfort Light Insulated, and consider a Reactor sleeping pad liner.
Is this sleeping bag suitable for warm weather and summer temperatures?
Yes, this sleeping bag is great for warm-weather camping. It features a full-length side zipper (with two zipper sliders) that extends through the foot box for ventilation or to transform into a lightweight comforter.
Can this sleeping bag be zipped to another sleeping bag?
No, this sleeping back does not join with another. If you're looking to couple your sleeping bag to a Sea to Summit Unisex model, consider our Traverse synthetic model.