Western Mountaineering Caribou MF

The Western Mountaineering Caribou MF is a lightweight warm-weather bag with a wider-than-average mummy cut, best suited to side sleepers who want more room at the knees and shoulders than a narrow taper gives. Filled with 255 g of 850+ fill power goose down for a total weight of just 567 g, it carries a manufacturer-rated limit of 2°C — a range for mild nights, not freezing conditions. The 20D MicroLite XP shell is light and compresses well but has no water-resistant treatment, so this bag assumes a dry tent or shelter rather than direct moisture exposure. Sewn-through baffle construction is the standard choice for lightweight summer bags — it keeps weight down, though without separated layers it creates minor cold spots along the seams. The short-length cut for users up to 168 cm saves further grams and pack volume; at 30 × 15 cm packed, it's among the most compact bags in the Western Mountaineering range. A solid pick for warm-weather lightweight trips, where shaving sleep-system weight has a noticeable effect on overall base weight. Made in the USA.