Big enough for sunup-to-sundown treks and overnights, the men's Gregory Zulu 45 pack is light and agile thanks to the FreeFloat dynamic suspension—letting your back breathe, summer or winter.

Features:

• FreeFloat dynamic suspension system with independent, floating 3D lower back comfort cradle balances heavy loads with ease
• Fully adjustable torso length with open-air ventilated back panel offers a customizable fit and exceptional breathability
• Designed around the architectural principles of tension and compression, the perimeter frame provides stable yet flexible support to comfortably carry the load on your back
• Pack body fabric is 40% recycled 400-denier ripstop polyester with a PFC-free durable water repellent (DWR); pack bottom is 420-denier nylon with a PFC-free DWR
• Sunglass QuickStow system on shoulder harness allows for quick, secure access to your shades
• Sternum strap buckle has safety whistle and hydration tube hose clip
• Oversize zippered hipbelt pockets provide easy access for must-haves on the trail
• Dual stretch-mesh side pockets allow you to grab your water bottle on the go
• Top zippered quick-access pocket and interior zippered pocket with key clip help you organize essentials
• Front heavy-duty stretch-mesh stash pocket holds an extra layer
• Signature U-zip panel provides easy access to all of your gear, regardless of location
• Adjustable bungee attachment lets you secure trekking poles or ice axes