Feathered Friends Vireo UL Sleeping Bag

The Vireo UL is Feathered Friends' minimalist thru-hiking bag, built as a hoodless, zipperless elephant's-foot design rather than a full mummy – it covers the legs and lower body while relying on a separate down jacket for the torso and head. That combination drops total weight to just 441 g, using 247 g of 950 fill-power RDS-certified goose down in a variable fill: the lower half rated to 25°F/-4°C where warmth matters most against cold ground, the thinner upper half only to 45°F/7°C. The 10D Pertex Endurance UL shell and 15D Flite ripstop liner keep fabric weight minimal, and the quilt-style build skips zipper, hood and draft tube entirely. Both stuff sack and storage sack are included, and it is sized for users up to 172 cm, suiting shorter hikers specifically. This is a system piece, not a standalone bag: it only works as intended paired with a down jacket, and relying on it alone in genuinely cold conditions leaves the upper body underinsulated. Made in Seattle, it targets ounce-counting thru-hikers willing to manage a two-piece sleep system for the weight savings.