Gregory Zulu 55 Halo Blue S/M Professional Multi-Day Expedition Backpack

Gregory Zulu 55 Men's Backpack

The 5400520199980 is a professional-grade technical gear hardware unit engineered to provide high-fidelity weight distribution and integrated load oversight within a durable Halo Blue metallic industrial design. Driven by high-performance FreeFloat dynamic suspension architecture and a specialized perimeter alloy frame framework, this system utilizes a 55-liter storage capacity (optimized for size S/M ergonomics) to manage data-intensive expedition multitasking and high-frequency movement workflows with total fluidity. The hardware features specialized open-air tensioned mesh backpaneling and integrated 3.5-inch torso length synchronization, providing a clear and precise technical workspace for optimized mechanical productivity and collaborative hardware oversight across diverse alpine, weekend trekking, and high-altitude wilderness environments. Equipped with a 3D comfort cradle hipbelt and specialized Lifespan EVA foam harness technology, the system ensures rapid responsiveness and stable performance for complex hauling infrastructures requiring secure local equipment processing and consistent structural availability under recommended loads of up to 22.7 kg. Housed in a durable 740 x 350 x 330 mm high-density recycled 400D polyester ripstop chassis with specialized U-zip main body access, the unit includes an integrated custom-fit raincover and professional-grade SpeedClip hydration hanger protocols for superior signal integrity during critical long-range technical operations. Featuring specialized extra-large hipbelt pockets and an oversized front stretch-mesh compartment for high-speed technical utility, this reliable hardware serves as a sophisticated centerpiece for any high-performance professional infrastructure requiring robust structural integrity and efficient gear delivery.

Technical Specifications

- Model: Zulu 55

- Brand: Gregory (Samsonite Group)

- EAN: 5400520199980

- MPN: 145671-0527

- Size: Small / Medium (S/M)

- Color: Halo Blue

- Volume: 55 Liters

- Suspension System: FreeFloat Dynamic Suspension with Open-Air Backpanel

- Frame Material: Alloy Steel Perimeter Frame with Fiberglass Anti-Barreling Cross-stay

- Body Material: 40% Recycled 400D Polyester Ripstop (PFC/PFAS-free DWR)

- Base Material: 420D Nylon (PFC/PFAS-free DWR)

- Access Points: Top Loader, Front U-Zip Panel, and Bottom Sleeping Bag Compartment

- Max Carry Weight: 22.7 kg (50 lbs)

- Torso Fit: 38.1 - 48.3 cm (15" - 19")

- Hydration Compatible: Yes (SpeedClip Hanger for 3D Hydro Reservoir)

- Pockets: 6 External (including dual oversized hipbelt and dual side stretch mesh)

- Specialized Features: ComfortGrip Molded Zipper Pulls, Sunglass QuickStow, Adjustable Attachment Loops

- Included Accessories: Integrated Raincover (stowed in dedicated zippered pocket)

- Dimensions: 740.0 mm x 350.0 mm x 330.0 mm

- Finish: Halo Blue / Dark Grey Accents