Sweetwater UL 43L Backpack

When you need to move fast and cover serious miles without leaving gear behind, the Sweetwater UL 43L is our pick for ultralight backpackers and ambitious day hikers. Its ultralight construction sheds pack weight so your legs do the work, while 43 liters of capacity handles multi-day loads without compromise. Three torso sizes mean you dial in the fit before you ever leave the trailhead.

• 43-liter capacity bridges the gap between fast day missions and multi-day hauls — enough room for the full kit without unnecessary bulk
• Ultralight construction keeps base weight low so you stay fresher over long miles and big elevation gains
• Available in Small, Medium, and Large torso fits — proper carry fit before the first step matters as much as what's inside
• Built for backpacking, thru-hiking, and aggressive day hikes where your pack weight is just as important as your pace
• Mercury colorway keeps a low-profile, versatile look that works from car camping drop-offs to remote base camps