Cumulus X-Lite 400

The Cumulus X-Lite 400 (v1) pushes the X-Lite line toward colder conditions — 400 g of 900 cuin goose down at a 98/2 ratio in trapezoidal baffles gives a manufacturer-rated comfort of -1 °C, limit of -7 °C and extreme of -24 °C. At 575 g total weight, it sits at the boundary between three-season and light winter use. The construction shares its bones with the lighter bags in the range: a two-way 2/3-length zip on the right side, a draft tube without a full collar, and shell and liner both in 19 g/m² Toray Airtastic fabric. Internal length (202 cm) and shoulder width (77 cm) match the rest of the line, but packed size grows to 25×16 cm (5.5 l). The down is RDS-certified, the bag comes in yellow, is made in Poland, and fits users up to 185 cm. Its weight-per-degree figure of 82.1 g/°C is noticeably better than the lighter versions in the range. Suited to bikepacking, trail running and light alpine-style ascents in colder weather.