Sea to Summit Trek Sleeping Bag

The Free-Flow Zip System features a side zipper and a separate foot-box zipper. This allows you to unzip the bag partially or fully to create a quilt-like experience, or open the foot box independently for ventilation when temperatures rise.

This bag features a semi-rectangular shape that is slightly wider at the hips and narrower at the shoulders compared to standard unisex bags. This design provides extra room for movement while maintaining thermal efficiency.

Yes. The down insulation is treated with a non-PFAS Ultra-Dry Down finish, which helps the feathers resist moisture and maintain their loft even if they get slightly damp.

Yes, the zipper system is designed to allow you to couple this bag with other compatible Sea to Summit sleeping bags, making it a great option for couples who want to share a sleep system.

The 30°F rating is the 'Comfort' rating, which is the temperature at which an average woman can sleep comfortably without feeling cold. The 12°F ISO Lower Limit is the temperature at which the bag will keep you alive, but you will likely be quite cold.

Yes, the bag uses RDS-certified 650+ fillpower duck down. This certification ensures that the down comes from ducks that have been treated humanely throughout their lives.