The Thermarest Corus 20F/-6C Down Quilt (Regular) is a premium three-season option for backpackers who want warmth with the freedom of a quilt system. EN ratings support clear trip planning, with a 0 °C comfort rating and a -6 °C limit rating. The Regular sizing suits a wide range of users and pairs well with an insulated mat for efficient camp sleeping. This is a strong choice for buyers seeking a compact, performance-led down quilt for demanding customers.