BEST USE: Camping & Backpacking
PERFORMANCE: 2.5 Season
WEIGHT: 2lbs 4.7oz | 1040g
COMPRESSED VOLUME: 7.1 liters
Shipping & Returns
Free express delivery in Australia for orders over $49.99*.
For all other orders under $49.99, we charge a flat fee of $10.00 for delivery in Australia.
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We do not ship to an address outside of Australia.
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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.
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
|Trailhead II (-1°C) Regular
|Trailhead II (-1°C) Regular Wide
|Trailhead II (-1°C) Long
|Trailhead III (-7°C) Regular
|Trailhead III (-7°C) Regular Wide
|Trailhead III (-7°C) Long
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 hydrophobic down and DWR finishes are Non-PFC.
The down is RDS-certified responsibly sourced. The non-PFC Ultra-Dry Down™ hydrophobic treatment means it absorbs less water than untreated down and dries much more quickly. Ultra-Dry Down does not affect the loft or lifespan of the down, or its breathability. The treatment will last through at least 20 washings
Non-PFC DWR Shell fabric:
Despite being incredibly lightweight, the 10 Denier UL Nylon is down-proof and surprisingly durable. A non-PFC DWR finish helps the shell to shed external moisture. This fabric is part of the secret to making the Spark and Flame Down Sleeping Bags and the Ember Quilt Series some of the lightest, most packable sleep system products available today.
Frequently Asked questions
Warm enough for colder weather camping or travel?
Perhaps. You would need the Th III - its Waveloft insulation maximizes loft. Pair it with a 3.5+ R-Value sleeping mat (perhaps Comfort Light Insulated) and consider a Reactor liner.
Suitable for summer temperatures?
Yes. A full-length side zipper (with two zipper sliders) that extends through the foot box can be opened for ventilation or to turn the Trailhead into a comforter.
Able to be zipped to another sleeping bag?
No. If you are looking to couple your sleeping bag to a Sea to Summit Unisex model, consider the Traverse synthetic sleeping bag