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Sea to Summit's Trek -1C Down Bag provides versatile temperature control and comfort. It features 650+ fill duck down, a Free Flow zipper system for ventilation, and a generous semi-rectangular shape. The bag is not ultralight but offers a good balance of warmth, space, and adaptability.
Sea to Summit says:
The Trek Down Sleeping Bag is the perfect option for vehicle-based travels and overnight camping. With 650+ FILL Power, this versatile and spacious bag uses an ergonomic design to offer additional warmth and comfort.
Our Verdict
Sea to Summit's Trek -1C Down Bag delivers a sleep system with versatile temperature control and a spacious, comfortable fit. This semi-rectangular bag utilises water-resistant 650+ fill duck down to provide warmth rated to -2°C.
A key feature is Sea to Summit's Free Flow zipper system, which has two sliders on the full-length and foot box zips and a half-length zip on the opposite side. So, it is a versatile bag with plenty of ventilation options if needed. The generous semi-rectangular shape offers roomy space.
Other features include a comfortable fitted hood, a draft collar that runs along both sides of the bag, vertical chest baffles, and a horizontal lower baffle that mitigates down shifting throughout the night. The 20D recycled polyester shell is light yet sturdy, and two length options provide a dialled fit.
While not an ultralight minimalist bag, the Trek -1C hits an outstanding balance of warmth, roominess, and versatility.
- Reviewed by Ultralight Outdoor Gear
Features
- Duck Down with Ultra Dry Down treatment for improved water resistance in damp conditions.
- Recycled polyester offers durability and comfort for lightweight adventures in a range of climates and conditions.
- The Free Flow Zip System offers temperature regulation and multiple sleeping bag configurations for added freedom in the outdoors.
- The Semi Rectangular Fit features a spacious design for added comfort and room that is best suited to car camping and shorter adventures.
Specifications
Temperature Rating
- EN13537:2012 Comfort: 3°C | 37°F
- EN13537:2012 Comfort Limit: -2°C | 28°F
Specs
- Weight: 1226g (excludes storage bags)
- Fill weight: 520g
- Fits up to: 5.5 ft / 170cm
- Internal Width Shoulder: 145cm
- Internal Width Waist: 145cm
- Internal Width Feet: 120cm
- Compressd Size: 18L
Fit
- Semi-rectangular fit: Spacious and generous, a roomy fit for car camping and the occasional overnighter.
Materials & Construction
- Insulation: 650+ FILL Power, RDS-certified, Duck Down with Ultra Dry Down treatment for improved water resistance in damp conditions
- Fabric: Recycled 20-Denier Polyester shell and lining.
- Zipper: Free Flow Zip System: Primary zip - full length #5 with zip-plow and two sliders.
Secondary zip - 1/2 length #5 with zip-plow and two sliders.
Footbox zip - #5 with two sliders. - Baffle Construction: Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout.
- Collar: Vertical chest baffles, horizontal baffles lower half and base, box wall baffle construction throughout.
- Hood: Generous fitted hood with two soft touch adjustments. Fits a Sea to Summit regular pillow.
- Draft Tube: Single, synthetic-filled, draft tube along the top of all zippers.
- Intergration: Pairs with Women's Sea to Summit bags, and STS quilts.
