The UNUS52 is an ultralight backpack designed for hiking and trekking, weighing only 740g. It features a 42L main compartment with an additional 10L of external expansion, making it ideal for lightweight travelers on 3 to 7-day journeys. Core Fabrics UltraWeave™ / UltraStretch™ Ultra™200X (Main Fabric): Made from UHMWPE fibers (similar to Dyneema), it is several times stronger than traditional nylon. Constructed with a three-layer composite structure (X-ply yarn + waterproof film), it offers lightweight durability, abrasion resistance, and tear resistance. Ultra™400X (Reinforced Base): Provides enhanced abrasion resistance, designed to withstand prolonged ground dragging and friction against rocks. UltraStretch™: A blend of UHMWPE fibers and Nylon 66, delivering high elasticity and durability. Ergonomic Design | Comfort & Stability The Ultralight Composite Frame System features a dual-track aluminum alloy tube frame (22g each) for a lightweight yet sturdy structure. A carbon fiber rod enhances back panel stability, with adjustable height via the shoulder straps for an optimal fit—perfect for long-distance trekking. EVA High-Support Foam Padding in the shoulder straps and hip belt for enhanced comfort and weight distribution. Elastic Shoulder Strap Pockets for quick access to a water bottle without removing the backpack. X-shaped Hip Belt with an adjustable angle, ensuring a secure fit across different body types. Multi-Functional Attachment & Storage System UHMWPE Reflective Daisy Chain (Front Sides): Compatible with the AC-K03 bungee cord to secure trekking poles, umbrellas, ice axes, and other gear. The reflective feature enhances visibility and safety at night. UltraStretch™ Fabric Storage (Sides & Front): Convenient for storing rain jackets, insulation layers, water bottles, headlamps, and other frequently used items. Y-Strap Top Compression System: Secures items at the top of the pack with a detachable loop to prevent slipping. Optional Accessories AC-B01 – Detachable Hip Belt Pocket AC-K03 – Elastic Cord Attachment Key Features Summary Total Weight: 740g Constructed with UltraWeave™ / UltraStretch™ Fabrics Adjustable Ultralight Frame System Reflective Daisy Chain Top Y-Strap Compression System Quick-Access Chest Water Bottle Pocket X-Shaped Waist Belt Buckle Ice Axe Loop UltraWeave™ Care InstructionsHand wash only: Do not machine wash UltraWeave fabric. For cleaning, try to wipe off dirt with a towel as much as possible before hand washing. Specifications Material | Material Info Main Fabric: Ultra™200X in Gravel Grey Bottom: Ultra™400X in Black Pockets: UltraStretch™ / Nylon Spandex Shoulder straps & Hip Belt: 210D Nylon with UHMWPE ripstop Cord：UMHWPE+3M reflective yarn Webbing：100% Nylon Frame Material Carbon Fiber Stay + Aluminum Alloy Tube Capacity Main Compartment: 42L Side Pockets: 2x2L Center Pocket: 6L Total weight 740g / 26oz Dimensions Unpack Hight: 85cm Width: 29cm Depth: 18.5cm Top circumference: 98cm Bottom circumference: 83cm size Straps: S/M - 15.5 inch / 39.5 cm (Torse40cm) Torso: 15"~ 20" / 37cm~51cm HIp Belt: 28"~ 40" / 72cm~102cm Recommended Comfortable Load 12kg / 26.4lbs Maximum Recommended Load 18kg / 40lbs Size chart Unit：inch / cm Straps(1) Straps(2) Recommended Torso Length 15"/37 ~ 17"/43 16"/40 ~ 20"/51 Shoulder Straps Length 15.5"/39.5 17"/43.5 A 160cm tall model uses a 15.5-inch shoulder straps. A 168cm tall model uses a 17-inch shoulder straps. A 188cm tall model uses a 17-inch shoulder straps.
