Editor’s Note: We updated our Ultralight Backpacks guide on March 17, 2025, to add the Durston Kakwa 55 as our best overall pick in ultralight packs, the Gossamer Gear Kumo 36 as the best budget, the ...

"Hearst Magazines and Yahoo may earn commission or revenue on some items through these links." Choosing an ultralight pack is one of the trickiest gear decisions—you aren’t just considering the weight ...