Can I zip two Sea to Summit sleeping bags together?
Zipping two compatible sleeping bags together forms a warm, cozy, comfortable sleep environment for two people. This is a far more flexible option than a double sleeping bag (which explains why there are so few double sleeping bags on the market).
BUT not all sleeping bags can be zipped together. Here’s how you can tell which Sea to Summit bags can be coupled:
Sea to Summit sleeping bags are organized into three categories.
- Comfort & Versatile
- Light & Compact
- Specialty
Comfort & Versatile Sleeping Bags:
- Altitude (right #5 zip)
- Journey (right #5 zip)
- Venture (right #5 zip)
- Ascent (left # 5 zip)
- Trek (left # 5 zip)
- Traverse (left # 5 zip)
Discontinued Right-Hand #5 Zips: Women's Trek, Women's Talus & Women's Latitude.
Our Light & Compact sleeping bags are not designed to zip together.
Light & Compact Sleeping Bags:
- Flame Fm I and Fm II (right #3 zip)
- Flame Fm III and Fm IV (2019 – 2022) (right #3 zip)
- Flame Fm III and Fm IV (2022 – 2023) (right #5 zip)
- Spark Sp I and Sp II (left # 3 zip)
- Spark Sp III and Sp IV (left # 3 zip)
- Spark Sp III and Sp IV (2022 – 2023) (right #5 zip)
Special Sleeping Bags:
- Alpine: Alpine sleeping bags are intended for cold, high-altitude adventures. They are not designed to zip together.
- Basecamp/Amplitude: Basecamp / Amplitude (Down and Synthetic) are designed to offer maximum comfort and ventilation. They have full-length zippers on both sides and a footbox zipper. Any two Basecamps / Amplitude can be zipped together. A Basecamp / Amplitude can be zipped to any of the Comfort & Versatile sleeping bags listed above.
- Traveller: Traveller sleeping bags are designed for lightweight comfort and ventilation. Two Traveller sleeping bags of the same length can be zipped together, but a Traveller will not zip to any other Sea to Summit sleeping bag.
To help you confirm which sleeping bags will zip together please refer to the below matching guide.
Current Sleeping Bags that zip together
Model | Year | Zip Side/Type | Zip Compatibility |
Alpine | 2010-2023 | Left #5 | None |
Traveller | 2016-2023 | Left #3 | Another Traveller of same length |
Altitude | 2019-2023 | Right #5 | Any Comfort & Versatility with left zip |
Journey | 2019-2023 | Right #5 | Any Comfort & Versatility with left zip |
Venture | 2019-2023 | Right #5 | Any Comfort & Versatility with left zip |
Quest | 2019-2023 | Right #5 | None |
Ascent | 2019-2023 | Left #5 | Any Comfort & Versatility with right zip |
Trek | 2019-2023 | Left #5 | Any Comfort & Versatility with right zip |
Traverse TV | 2019-2023 | Left #5 | Any Comfort & Versatiltiy with right zip |
Trailhead | 2019-2023 | Left #5 | None |
Past Sleeping Bags that zip together
Model | Year | Zip Side/Type | Zip Compatibility |
Traverse XT | 2010-2016 | Left #5 | Any Comfort & Versatility with right zip |
Micro | 2010-2016 | Left or right #3 | Only 2010-2016 Micro with opposite zipper side |
Trek | 2010-2016 | Left or right #5 | Any Comfort & Versatility with opposite zip side |
Talus | 2012-2018 | Left #5 | Any Comfort & Versatility with right zip |
Basecamp | 2016-2018 | Left or right #5 | Another Basecamp or any Comfort & Versatility |
Latitude | 2016-2018 | Left #5 | Any Comfort & Versatility with right zip |
Women's Trek | 2016-2018 | Right #5 | Any Comfort & Versatility with left zip |
Women's Talus | 2016-2018 | Right #5 | Any Comfort & Versatility with left zip |
Women's Latitude | 2016-2018 | Right #5 | Any Comfort & Versatility with left zip |
Micro | 2016-2018 | Left #5 | Any Comfort & Versatility with right zip |
Amplitude | 2019-2022 | left and right #5 | Another Amplitude/Basecamp or any Comfort & Versatility |
Note - in the above table, the zipper referred to is the main side zipper. Some bags also have a footbox zipper; some have a secondary short side zipper. The zipper used to couple two sleeping bag together is always the main side zipper.
The zipper descriptions relate to Sea to Summit sleeping bags. A sleeping bag from another brand may zip together with a Sea to Summit bag provided the zipper is the same size and has the same teeth oriented in the same way facing inwards. In case of doubt when trying to couple two bags, do not force a zipper slider - damage can result to the zipper slider or zipper track.