Sea to Summit Quilt Ember I (10 °C)

The Sea to Summit Ember I is a minimalist down quilt built around a narrow comfort window: a 10 °C comfort rating with a 4 °C limit, firmly summer and shoulder-season territory rather than general three-season use. At 420 g including 200 g of 850+ fill power hydrophobic goose down, it sits toward the lighter end of quilts in this category, reflected in a weight-per-degree figure of roughly 105 g. Construction is sewn-through rather than box-baffled, the classic way manufacturers cut weight on warm-rated quilts, at the cost of some cold-spot risk at the seams. Shoulder width is 120 cm and hip width 150 cm, tapering to an 87 cm foot box, and it packs to a compact 14 × 13 cm, around 1.8 L. This quilt suits ultralight backpackers who run warm, hike mainly in summer, or want a light supplemental layer rather than a standalone bag for anything near freezing. Cold sleepers or anyone expecting nights near or below 4 °C should look at a warmer rated option instead.