When you're slogging up switchbacks in the sun, the perimeter frame on the Zyro 58 keeps your back cooler and drier than other packs. It rests on your shoulders and lumbar, but curves away from the middle of your back to let the breeze blow through. Fewer points touching your body translates to less sweat. And, as one of the lightest backpacks in its internal-frame class, you can find your way to the shade more quickly and bust out those snacks from the zipper pockets in the adjustable hipbelt. Other purposeful pockets include a sleeping bag compartment, a hydration sleeve, shove-it pockets, and an accessory panel. Even when loaded to capacity, the Zyro 58 remains comfortable thanks to its suspension system capable of on-body adjustments and padded straps and belts.

• Volume: 3539 in3 / 58 L
• Frame Type: Perimeter
• Weight: 4 lbs 7 oz / 2.01 kg
• Torso Fit Range: 16 - 20 in / 40 - 51 cm (Adjustable)
• Optimal Carry Weight: 30 - 50 lbs / 14 - 23 kg
• Dimensions: 32 x 16 x 13 in / 81 x 41 x 33 cm
• Body Fabric: 210D Nylon
• Reinforcement Fabric: 420 D Nylon
• Frame Material: Sprung Steel
• NadaTech suspension with a lightweight perimeter frame
• PerfectFIT™ on-body torso adjust
• Adjustable hip belt padding
• Removable top lid main access w/large zippered pocket and zippered slash pocket
• 2x large stretch side panel shove-it pockets
• Large zippered front panel accessory pocket
• 2x zippered hipbelt pockets
• 2x stretch water bottle pockets
• Dual side compression straps
• Tuck away trekking pole loops
• Adjustable sternum strap
• Zippered sleeping bag access