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Sea to Summit Trailhead THII Synthetic Sleeping Bag (-1C)

Sea to Summit Trailhead THII Synthetic Sleeping Bag (-1C)
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If you are new to outdoor recreation, or you only camp occasionally, the Trailhead™ synthetic mummy sleeping bag is a great value-oriented option. However, the modest price tag doesn’t mean corners were cut 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™ construction for improved air-trapping for maximum warmth

Quality DWR-treated nylon shell material helps repel external moisture

Comfortable 20D nylon liner fabric

Full-length YKK® #5 main side zip extends through the foot box zip for increased ventilation and allows the bag to be used as a comforter

Oversized draft tubes over the zippers to seal in warmth

Includes stuff sack


Warm enough for colder weather camping or travel?

Yes. The WaveLoft™ insulation construction maximizes loft and results in a temperature rating of 30°F (-1C). Frequent cold-weather campers might look to the Traverse™ sleeping bag series. In cool or cold conditions, make sure you have a higher R-Value sleeping mat like the Comfort Light Insulated.


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 fully-flat comforter in really warm weather.


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, the Traverse ™ sleeping bag series would be your synthetic-insulated choice

All Sea to Summit products carry a lifetime warranty against defects in workmanship and materials to the original owner for the intended life of the product under normal use, with proof of purchase from an authorized Sea to Summit reseller.

The one exception to the lifetime warranty is for items which are intended for use in situations resulting in higher rates of wear and tear – the duration of the warranty for these products is clearly marked on the packaging and on the Sea to Summit website.

This warranty does not include damage due to improper use or care, accident, or negligence. This warranty also excludes normal wear and tear and material breakdown due to age, use, or environmental conditions.

Sea to Summit’s liability for warranty claims will be limited to repair, replacement, or credit. The Sea to Summit warranty does not cover damage to items stored in, or used in conjunction with its products.

Warranty decisions are left to the discretion of the Warranty & Returns Department.


Sea to Summit Waveloft

Part Numbers

Option UPC MPN Store SKU
Regular 9327868095704 S4021 SLE554160931