Sea to Summit Journey Women's Down Sleeping Bag 18

The Sea to Summit Journey Women's Down Sleeping Bag 18 is a women-specific, semi-rectangular down bag built for colder nights. A -8°C comfort rating, -15°C limit, and -36°C extreme place it in the 3-4 season bracket, a reasonable choice for late-autumn or early-spring trips where temperatures drop well below freezing. The 700g fill of 650 FP hydrophobic duck down sits in vertical baffles that limit down shift and cold spots. A full-length, two-way zip on the left side is backed by a draft collar and draft tube, while footbox ventilation dumps excess heat on milder nights. At 148cm across the shoulders and hips, the semi-rectangular cut gives noticeably more room to move than a snug mummy shape. That comfort and space come at a weight cost: 1180g puts this bag firmly in the reliable-cold-weather category rather than the ultralight one, though a weight-per-degree figure of 78.7g suggests the insulation is used efficiently for the warmth on offer. A solid pick for women prioritising cold-weather margin over a minimal base weight.