Employing weather-resistant 650+ water-resistant duck down insulation and lightweight fabrics the Sea to Summit Trek II sleeping bag effectively balances weight and thermal efficiency. Its suggested temperature rating of 18 degrees F makes it ideal for 3-season use.
The bag is insulated with 650+ fill Ultra-Dry Down insulation. Renowned for their efficiency in retaining heat and compressible properties the feathers and fibers of down have an incredibly soft comfortable feel and despite advances in synthetic materials continue to provide the best warmth-to-weight ratio of any insulation available. The one weakness of down insulation is that it loses much of its ability to maintain warmth when it gets wet but the Trek II’s insulation has been treated to add water-repellency allow it to dry faster if it should become wet and most importantly enable it to retain much of its insulating qualities even while wet. The bag’s PermaShell fabric also has a DWR treatment to further protect the insulation from the elements. Soft internal fabrics provide next-to-skin comfort.
The tapered rectangular shape of the bag provides a bit more comfort than restrictive mummy bags while still ensuring thermal efficiency. This efficiency is bolstered by horizontal baffles and 3D side walls that provide the down fill with space to loft while making certain that it doesn’t migrate and create dead spots. A contoured insulated hood adds additional warmth and has built-in adjustability to draw it close in cold temperatures. An insulated draft tube behind the full-length zipper helps to keep cold air from finding its way inside. That zipper continues around the foot of the bag enabling it be unzipped completely for use as a blanket or comforter. A zippered internal pocket is a great place to stash valuables.
Available in your choice of Regular (fits to 6’ 0”) Regular Wide (fits to 6’ 0” with additional girth at the shoulders torso and feet) and Long (fits to 6’ 4”) size options each Sea to Summit Trek II sleeping bag includes an Ultra-Sil compression bag and a hybrid storage cell/laundry bag.
- Ultra-DRYDown 650+ duck down insulation
- 18-30 Degree F suggested temperature rating
- Multiple lengths
- 3D hood contstruction
- 30D shell fabric
- 2D soft-touch lining
- Full-length zipper
- Storage/stuff sack included
Best Use Backpacking, Camping Insulation Type Down Item Weight Regular: 2 lb, 2 oz
Regular Wide: 2 lb, 7 oz
Long: 2 lb, 6 oz
Other Compression Bag and Storage Cell/Laundry Bag included Warranty Limited Lifetime Shell Material 2D PermaShell w/ DWR Fits to Length Regular: 6' 0"
Regular Wide: 6' 0"
Long: 6' 4"
Fits to Girth Regular: 60"
Regular Wide: 68"
Fill Material Ultra-Dry Down 650+ Duck Down Temperature Rating 18 Degrees F EN Comfort Rating 30 Degrees F EN Lower Limit Rating 18 Degrees F
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