Big Agnes Sweetwater UL 60L

The Sweetwater UL 60L is a 60-litre multi-day trekking backpack built in recycled nylon, weighing 1446 g — about 24.1 g per litre of capacity. Running-vest-style shoulder straps distribute load across the chest rather than pulling down on the shoulders alone, and an integrated frame system transfers weight to the hip belt, a combination aimed at hikers carrying a multi-day load rather than a light day pack. At 60 litres it has room for several days of food, a sleeping system and shelter, sitting in trekking-pack territory rather than the ultralight thru-hiking end of the spectrum. The use of recycled nylon reflects a lower-impact materials choice without other performance details specified here. It suits multi-day trekking where you want structured load transfer and a running-vest fit rather than the minimal frameless builds common in the ultralight category.