Trek Down Sleeping Bag (-18° C)
BEST USE: Camping, Overlanding, Van Life
PERFORMANCE: Cold climate
WEIGHT: 4lb 2.8oz | 1895g
COMPRESSED VOLUME: 14.2L
LOWER TEMP RATING: 0°F | -18°C
- RDS-certified, 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Includes a recycled 20D polyester shell with a non-PFAS DWR finish blocks wind and moisture, while the polyester liner provides pure comfort.
- Free-Flow Zip System offers great temperature regulation and multiple sleeping bag configurations
- Semi-rectangular fit is designed for spacious comfort when you're camping or traveling
- Sea to Summit Guarantee is offered for the Lifetime of this product
If you've ever wished for a less-constrictive sleeping bag that keeps you comfortable in a variety of cool-to-warm conditions, the Trek may become your go-to bag. The Free-Flow Zip system allows you to open the bag sequentially for ventilation up to the point where it is opened flat as a quilt - you can even secure the snaps around your shoulders, open the footbox zipper and 'wear' the Trek around camp. 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment keep you insulated in damper conditions. Slip an Aeros Pillow into the hood and enjoy a great night's sleep - wherever your travels take you.

DESCRIPTION
If you've ever wished for a less-constrictive sleeping bag that keeps you comfortable in a variety of cool-to-warm conditions, the Trek may become your go-to bag. The Free-Flow Zip system allows you to open the bag sequentially for ventilation up to the point where it is opened flat as a quilt - you can even secure the snaps around your shoulders, open the footbox zipper and 'wear' the Trek around camp. 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment keep you insulated in damper conditions. Slip an Aeros Pillow into the hood and enjoy a great night's sleep - wherever your travels take you.
Features
- RDS-certified, 650+ fillpower duck down with a non-PFAS Ultra-Dry Down treatment to stay drier in damp conditions
- Includes a recycled 20D polyester shell with a non-PFAS DWR finish blocks wind and moisture, while the polyester liner provides pure comfort.
- Free-Flow Zip System offers great temperature regulation and multiple sleeping bag configurations
- Semi-rectangular fit is designed for spacious comfort when you're camping or traveling
- Sea to Summit Guarantee is offered for the Lifetime of this product
TECH SPECS
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Best UseCamping, Overlanding, Van Life
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Comes With40D recycled, bluesign APPROVED nylon compression bag
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InsulationRDS certified, 650+ non-PFAS Ultra-Dry Down
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ShapeTapered rectangular
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Zip OptionsFree-Flow zipper system
| -1°C Regular | -1°C Long | -9°C Regular | -9°C Long | -18°C Regular | -18°C Long | |
|---|---|---|---|---|---|---|
| Bag Weight | 1119g | 1253g | 1436g | 1611g | 1895g | 2098g |
| Compressed Volume | 8.2 L | 8.8 L | 10.6 L | 12.2 L | 14.2 L | 15.9 L15.9 L |
| Compression Sack | 13 L | 13 L | 20 L | 20 L | 26 L | 26 L |
| Fill Weight | 380 g | 437 g | 635 g | 735 g | 1000 g | 1163 g |
| Fits Up To Height | 185 cm | 198 cm | 185 cm | 198 cm | 185 cm | 198 cm |
| Temperature Rating (ISO Lower Limit) | -1°C | -1°C | -9°C | -9°C | -18°C | -18°C |
| Women's Temp Rating (ISO Comfort) | 3°C | 3°C | -3°C | -3°C | -11°C | -11°C |
TECHNICAL FEATURES
Frequently Asked questions
What are the differences between the Trek and the Ascent?
The Trek has a broader cut and is intended for travel/camping/some backpacking. The Ascent is a more technical bag for ambitious backcountry use.
Can Treks be zipped together?
Yes - the unisex and Women's Trek can be coupled (Unisex Trek will zip to most STS Women's bags)
Is the Trek suitable for warmer weather?
Yes! The Free-Flow zipper system provides unparalleled ventilation and allows the bag to be opened flat as a quilt