Sea to Summit Trek Women's Down Sleeping Bag

The Sea to Summit Trek Women's Down Sleeping Bag is built with a women's-specific fit and 650 fill-power RDS-certified duck down, treated with a non-PFAS Ultra-Dry hydrophobic finish so the down keeps its loft if it picks up damp overnight. The semi-rectangular shape gives more room through the hips and shoulders than a tapered mummy cut, and the 20D shell denier keeps the fabric reasonably robust without excess weight. As with the Spark Pro, the Free-Flow zip opens the bag flat like a quilt for warm nights, or it can be worn wrapped around the shoulders like a robe while moving around camp. Recycled materials feature in the construction alongside the RDS and PFAS-free credentials. No weight or temperature rating is listed for this entry, so anyone comparing it against other bags for a specific trip's expected low temperature will need to check the current product page before deciding whether it's warm enough.