Sea to Summit Trek Down Sleeping Bag

Yes, the Free-Flow Zip System allows you to unzip the bag completely, transforming it into a flat quilt. This is ideal for warmer nights when you want to drape the insulation over you rather than being fully enclosed.

The 30-degree rating is a standard comfort limit for most users in spring, summer, and fall. However, if you tend to sleep cold, you may want to pair it with a high-R-value sleeping pad to ensure you stay warm when temperatures drop near that lower limit.

The down is treated with a non-PFAS water-repellent finish, which helps the feathers resist moisture and maintain their loft better than untreated down. While it is not waterproof, it provides a crucial buffer against condensation inside your tent or humid air.

The semi-rectangular shape offers more room in the shoulders and hips compared to a traditional mummy bag, making it much more comfortable if you are a side sleeper or someone who shifts positions frequently at night.

Yes, the zip system is designed to allow you to pair this bag with another compatible Sea to Summit bag. This is a great feature for couples who want to share warmth while camping.

With a compressed volume of 9.3 liters and a weight of 2.9 pounds, it strikes a solid balance between packability and comfort. It is compact enough for most multi-day backpacking trips without sacrificing the warmth of high-quality down.