Explore like a pro no matter your experience level. The Flex Trail 40-60L ultralight backpack gives you the ability to tailor the pack size to your adventure needs by taking advantage of its horizontal gussets. Cinch it down to a 40L cargo pack capacity for your shorter trips, then expand it out to 60L for your longer backpacking adventures. Continue to customize your backpack with the hardware-based adjustable torso. Keep your essentials close at hand with oversized mesh pockets and zippered hip pockets. The aluminum perimeter frame suspension keeps this backpacking pack lightweight while the support stays strong.